"this way to the stars"

Astronomical transit

Astronomical ceiling decoration in its earliest form can be traced to the Tomb of Senenmut (Theban tomb no. 353), located at the site of Deir el-Bahri, Egypt. The tomb and the ceiling decorations date back to the 18th Dynasty of ancient Egypt (ca. 1473 B.C.).

Astronomsko društvo Ruđer Bošković

Sydney, New South Wales, Australia

A. tomentosum

Astronomical easter

Astronomical distances

Scott Roberts

Astronium

Astronomical Observatory-II

Astronomical Journal

Astronomical Observatory of Vilnius University

Astronomical radio source

Astronomical Observatory of Quito

English

Tim DeBenedictis

The Astronomical League is an umbrella organization of amateur astronomy societies. Currently their membership consists of over 240 organizations across the United States, along with a number of Members-at-Large, Patrons, and Supporting members.The mission of the Astronomical League is to promote the science of astronomy through encouraging public interest via local astronomy clubs.The Astronomical League provides a number of observing awards to members locating and describing certain specified astronomical objects or events, and produces a periodical publication, The Reflector.

Astronomical Society of Victoria

Astronomical League

Astronomical latitude

Popular Observatory in Belgrade's instruments.jpg

Astronomical X-ray sources

The Astronomical Institute of Slovak Academy of Sciences was founded in 1953, when the state observatory on Skalnaté Pleso (founded in 1943 by Dr. Bečvář) got a status of astronomical institute and became one of the founding institutes of the newly born Slovakian Academy of Sciences. In memories of past and current employees, the institute and the observatory on Skalnaté Pleso were always blended in one and therefore one could consider for the year of the institute foundation already the 1943.

The Astronomical League is an umbrella organization of amateur astronomy societies.

The Astronomical Society of Southern Africa (ASSA), formed in 1922, is a widespread body consisting of both amateur and professional astronomers. The Council of ASSA meets by Skype. There are eight autonomous centres throughout Southern Africa.

Astronomical season

Astronomical clock

Astronomical coordinate system

Astronidium saulae

Astronomical gamma-ray source

Astronomical navigation

Astronomical aberration

IUCN2.3

February 2013

The Astronomical Society of Glasgow (ASG) was founded in 1954 in Glasgow, Scotland, by amateur astronomers and is dedicated to promoting an interest in Astronomy.

Astronomical observatories in Ukraine

Astronomical coordinate

The Astronomical Society of Victoria (ASV) is an amateur astronomy club in the state of Victoria, Australia. It was founded in 1922, making it one of the oldest such clubs in the country, and with some 1000 members it claims to be one of the largest amateur astronomy organisations in the southern hemisphere. Membership is open to all with an interest in astronomy, and the society caters for people with a wide range of ages, backgrounds, abilities and interests.The society has sections dedicated to providing support for members interested in specific aspects of astronomy, including astro-photography, comets, radio astronomy, solar observing, variable stars, and deep sky observing. It owns a suburban property which is used as the Lodge and Observatory / workshop, and it also runs the Leon Mow ()[ Dark Sky Site, located north of Melbourne. Its major project is the restoration of the Great Melbourne Telescope.

Astronomical catalogue

Astronomical refraction

Astronidium storckii

Astronomical algorithm

Astronium balansae is a species of flowering tree in the cashew family, Anacardiaceae, that is native to Argentina and Paraguay.

Tzadik TZ 7359

Astronomers from the USSR

Goncalo alves

Victoria, Australia

A. saccatum

The Astronomical Society of New South Wales (ASNSW) is an amateur astronomy club in the state of New South Wales, Australia. It was founded in 1954 and it has over 400 members.The Society's objectives are stated in its constitution as follows: "The ASNSW exists to bring together people interested in Astronomy and related sciences, and to promote public interest and education in Astronomy. The ASNSW provides members and the general public access to Astronomical observing facilities, educational lectures, and assistance in selecting, using and even building telescopes and related instruments."The Society has sections dedicated to providing support for members interested in specific aspects of astronomy, including astrophotography, computing, solar observing, the Solar System, double and variable star observing, deep sky observing and telescope making. It also runs two dedicated observing sites, one at Mount Bowen near Sydney and the other near the country town of Ilford, far from the city lights.

Astronomical calendars in Gotland

Astronomers from Russia

Astronome

Astronomical Society

Astronomische Gesellschaft

gee

Astronomic telescope

An astronomical filter is a telescope accessory used by amateur astronomers to simply enhance the details of celestial objects (much as with amateur photography). By contrast professional astronomers rigorously use filters on telescopes in order to understand the astrophysics (such as stellar classification and placement of a celestial body on its Wien Curve), occurring for the object in a given bandpass via photometry.Most astronomical filters work by blocking a specific part of the color spectrum above and below a bandpass, significantly increasing the signal to noise of the interesting wavelengths, and so making the object gain detail and contrast. While the color filters transmit certain colors from the spectrum and are usually used for observation of the planets and the Moon, the polarizing filters work by adjusting the brightness, and are usually used for the Moon. The broadband and narrowband filters transmit the wavelengths that are emitted by the nebulae (by the Hydrogen and Oxygen atoms), and are frequently used for reducing light pollution.

Astronidium tomentosum is a species of plant in the Melastomataceae family. It is endemic to Fiji.

Astronomist

Astronomers from the Soviet Union

Astronomical Observatory Belgrade

Astronium fraxinifolium

ASNSW

The Astronomical Society of Victoria (ASV) is an amateur astronomy club in the state of Victoria, Australia. It was founded in 1922, making it one of the oldest such clubs in the country, and with some 1000 members it claims to be one of the largest amateur astronomy organisations in the southern hemisphere.

Astronomical objects named after people

Plantae

Astronium (syn. Myracrodruon M.Allemão) is a genus of flowering plants in the cashew family, Anacardiaceae.
Astronium balansae

The Astronomical Image Processing System (AIPS) is a software package to support the reduction and analysis of data taken with radio telescopes. Developed predominantly for use with the then under-construction VLA, the generality inherent in its design allowed it to become the standard data-reduction package for most radio interferometers, including VLBI. Limited single-dish capability is also featured. Although partially replaced by CASA, it continues to evolve and remains widely used.

Astronomical event

Astronomical Society Ruder Boskovic

The Astronomical Society of South Australia (ASSA) was founded in 1892 and is the oldest society of its kind in Australia. It is the only representative body for amateur astronomy in the state of South Australia. It holds regular general monthly meetings, frequent meetings for members of specialised groups and has available two observatories, one with a 300mm telescope at The Heights School within easy reach of Adelaide and used primarily for public viewing, and a second at Stockport with 500mm and 450mm telescopes presently in service and a larger 36-inch instrument currently being considered.

Astronomical observatory

Astronomical epoch

Astronomical scales

The Astronomical Society of India (ASI) is an Indian society of professional astronomers and other professionals from related disciplines. It was founded in 1972, with Vainu Bappu being the founder President of the Society, and as of 2010 has a membership of approximately 1000. Its registered office is at the Astronomy Department, Osmania University, Hyderabad, India. Its primary objective is the promotion of Astronomy and related branches of science.

Jan Matejko-Astronomer Copernicus-Conversation with God.jpg

Astronomical bodies

Astronomische Gesellschaft in der Britischen Zone

Astronidium

Astronomical magnitude

Astronomical Institute of Slovak Academy of Sciences

The flight spare for the satellite

Astronomical scale

Astronomische Vereinigung Karntens

A. saulae

Babak Tafreshi

A. graveolens

yes

Astronomical X-ray source

Astronomical Observatory

Astronomer Ptolemy

The Astronomische Gesellschaft is an astronomical society established in 1863 in Heidelberg, the second oldest astronomical society after the Royal Astronomical Society.In 1882, the Astronomische Gesellschaft founded the Central Bureau for Astronomical Telegrams at Kiel, where it remained until during World War I when it was moved to the Østervold Observatory at Copenhagen, Denmark, to be operated there by the Copenhagen University Observatory.Around the turn of the 20th century the A.G. initiated the most important star catalog of this time, the Astronomische Gesellschaft Katalog (AGK).The assembly in Danzig (now Gdańsk) in August 1939 was the last until a meeting at Göttingen in 1947, when it was re-commenced as Astronomische Gesellschaft in der Britischen Zone. The post-war editorial board consisted of Chairman Albrecht Unsöld (Kiel), Otto Heckmann, J. Larink, B. Straßl, Paul ten Bruggencate, and also Max Beyer representing the amateurs of the society.

Astronomical Observatory of Patacamaya

Active

Astronomer Royal for Ireland

Astronomical body

Astronomical photographer

Crux

Astronomical arts

Astronomical transient

The Astronomische Gesellschaft Katalog (AGK) is an astrometric star catalogue. Compilation for the first version, AGK1, was started in 1861 by Friedrich Argelander and published between 1890 and 1954, listing 200 000 stars down to ninth magnitude.The second version, AGK2, was started in the 1920s, and published between 1951 and 1958 using photographic data obtained from the Bonn and Hamburg Observatories.The third version, AGK3, was started in 1956 and published in 1975. It contains 183,145 stars north of declination –2° with mean positional errors of ±0.13" and mean proper motion errors of ±0.009"/year.

An astronomical survey is a general map or image of a region of the sky which lacks a specific observational target. Alternatively, an astronomical survey may comprise a set of many images or spectra of objects which share a common type or feature. Surveys are often restricted to one band of the electromagnetic spectrum due to instrumental limitations, although multiwavelength surveys can be made by using multiple detectors, each sensitive to a different bandwidth. Surveys have generally been performed as part of the production of an astronomical catalog.

An astronomical filter is a telescope accessory used by amateur astronomers to simply enhance the details of celestial objects (much as with amateur photography).

Astronomer Royal is a senior post in the Royal Households of the United Kingdom. There are two officers, the senior being the Astronomer Royal dating from 22 June 1675; the second is the Astronomer Royal for Scotland dating from 1834.The post was created by King Charles II in 1675, at the same time as he founded the Royal Observatory Greenwich. He appointed John Flamsteed, instructing him "forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so-much desired longitude of places, for the perfecting the art of navigation."The Astronomer Royal was director of the Royal Observatory Greenwich from the establishment of the post in 1675 until 1972. The Astronomer Royal became an honorary title in 1972 without executive responsibilities and a separate post of Director of the Royal Greenwich Observatory was created to manage the institution.The Astronomer Royal today receives a stipend of 100 GBP per year and is a member of the Royal Household, under the general authority of the Lord Chamberlain. After the separation of the two offices, the position of Astronomer Royal has been largely honorary, though he remains available to advise the Sovereign on astronomical and related scientific matters, and the office is of great prestige.There was also formerly a Royal Astronomer of Ireland.

Astronomical coordinate systems

Astronium urundeuva

Astronium graveolens is a species of flowering tree in the cashew family, Anacardiaceae, that is native to the Yucatán Peninsula in Mexico, Central America, and South America as far south as Bolivia. Common names include Glassywood, Ronrón (Spanish), and Aroeira (Portuguese). This plant is cited in Flora Brasiliensis by Carl Friedrich Philipp von Martius.

Astronomical Easter

Astronomical Society Islands

University of Illinois Astronomical Observatory

Astronomical dating

J.Maxwell

An astronomical day refers to a length of day of exactly or nearly 24 hours beginning at noon instead of at midnight. The exact length has been variously defined as either that of a solar day or of a sidereal day.Astronomical days were historically used by astronomers (in contrast most commonly to solar days), but since the Industrial Revolution this usage has generally fallen out of favor, in order to avoid confusion with more conventional timekeeping.

The astronomical system of units, formally called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy. It was adopted by the International Astronomical Union (IAU) in 1976, and has been significantly updated in 1994 and 2009 (see astronomical constant).The system was developed because of the difficulties in measuring and expressing astronomical data in International System of Units (SI units).

Astronidium storckii is a species of plant in the Melastomataceae family. It is endemic to Fiji.

Astronomical ceiling of Senenmut's Tomb

Babak Sedehi

Astronomical satellite

ANS

In ancient times, only the Sun and Moon, a few hundred stars and the most easily visible planets had names. Over the last few hundred years, the number of identified astronomical objects has risen from hundreds to over a billion, and more are discovered every year. Astronomers need to be able to assign systematic designations to unambiguously identify all of these objects, and at the same time give names to the most interesting objects and, where relevant, features of those objects.The International Astronomical Union (IAU) is the officially recognized authority in astronomy for assigning designations to celestial bodies such as stars, planets, and minor planets, including any surface features on them. In response to the need for unambiguous names for astronomical objects, it has created a number of systematic naming systems for objects of various sorts.

Astronomical Engineering

Astronomical distance

Astronomers Without Borders

Department of Space Science

AIPS

Astronomical symbol

Astronomical catalogs

Universe Magazine

The Astronomical Society of South Australia (ASSA) was founded in 1892 and is the oldest society of its kind in Australia. It is the only representative body for amateur astronomy in the state of South Australia.

Astronomical units

Astronomical observatories by country

Astronomical Society of the Pacific

Astronomical Ephemeris

Astronidium victoriae is a species of plant in the Melastomataceae family. It is endemic to Fiji.

GPO Box 1059,

Astronidium victoriae

The Astronomia (Ancient Greek: Ἀστρονομία, "Astronomy") or Astrologia (Ἀστρολογία, also "Astronomy") is a fragmentary Ancient Greek hexameter poem that was attributed to Hesiod during antiquity. As the title of the poem suggests, it was astronomical in focus, dealing with the stars. It has been suspected that the Astronomia influenced the style of Aratus' Phaenomena, but the remains of the Hesiodic poem found in ancient quotations are too meager to allow for certainty on this matter.

Astronomical Observatory of the University of the Punjab

Astronomic timer

Farah Payan

Astronomical filter

The Astronomical Observatory of the University of the Punjab is an astronomical observatory, located in Lahore at the Quaid-i-Azam Campus of the University of the Punjab. The space observatory is operated by the University's Department of Space Science.

Astronomical table

Astronomical dusk

Astronomer (comics)

Astronomical Objects

Astronomical Observatory (University of Illinois at Urbana-Champaign)

*Astronium conzattii (S.F.Blake)
*Astronium gracile (Engl.)
*Astronium planchonianum (Engl.)
*Astronium zongolicum (Reko) nom. illeg.

Astronomical nomenclature

Over 400

Astronomical survey

Astronomical Society of New South Wales Inc.

ASV

Astronomische Vereinigung Kärntens

Astronomical algorithms are the algorithms used to calculate ephemerides, calendars, and positions (as in celestial navigation or satellite navigation). Examples of large and complex astronomical algorithms are those used to calculate the position of the Moon. A simple example is the calculation of the Julian day.Numerical model of solar system discusses a generalized approach to local astronomical modeling. The variations séculaires des orbites planétaires describes an often used model.

Astronomical clock (Besançon)

Right: Telescopes in the Public Observatory

A.C. Smith

Astronomische Vereinigung Kaerntens

Astronomical optical interferometer

Astronomical Analysis

Astronomical window

Roy McCord

Astronomer Green

Astronomic theory of glaciation

Astronomical radio sources are objects in outer space that emit strong radio waves. Radio emission comes from a wide variety of sources. Such objects represent some of the most extreme and energetic physical processes in the universe.

Astronomical Observatory of Capodimonte

Astronomical tide

Astronomical engineering

Astronomsko društvo "Ruđer Bošković"

Astronomical forcing

A. storckii

Astronomer royal for Ireland

Astronomical acronyms

Astronomical diary tablet

Astronomical Society of Southern Africa

Astronidium tomentosum

A. balansae

A. fraxinifolium

A. lecointei

Astronomical Image Processing System

The Astronomische Gesellschaft is an astronomical society established in 1863 in Heidelberg, the second oldest astronomical society after the Royal Astronomical Society.In 1882, the Astronomische Gesellschaft founded the Central Bureau for Astronomical Telegrams at Kiel, where it remained until during World War I when it was moved to the Østervold Observatory at Copenhagen, Denmark, to be operated there by the Copenhagen University Observatory.Around the turn of the 20th century the A.G.

Astronomical Observatory of Trieste (Italian: Osservatorio Astronomico di Trieste or OAT) is an astronomical center of studies located in the city of Trieste in northern Italy.The observatory traces its origins from the Nautical School founded in Trieste by the Empress Maria Theresa of Austria in 1753. Following the dissolution of Austria-Hungary after World War I and the annexation of Trieste by the Kingdom of Italy, the observatory joined the list of Italian astronomical observatories in 1923. Today the observatory is part of Italy's National Institute for Astrophysics (Istituto Nazionale di Astrofisica or INAF), which includes 20 research institutions around the country. The scientific production of the Astronomical Observatory of Trieste exceeds 130 papers per year, mostly published in international peer-reviewed journals.The main research activities done at the observatory concern extragalactic astronomy and cosmology (large-scale structure of the universe, intergalactic media), stellar physics, interstellar medium and the galaxy, the physics of the Sun and the solar system (radioastronomy, coronal plasma, cometary and interplanetary dust), high energy astrophysics (supernovae, gamma-ray bursts), astronomical technologies (computer systems for data acquisition and control, including remote control, acquisition, handling and analysis of images, supercomputing) and space astronomy (development of space technologies and space observations). Of special importance is the participation in the projects of the European Southern Observatory (ESO): the Very Large Telescope (VLT) operated by ESO in Chile; the Large Binocular Telescope (LBT) in Arizona, the Planck spacecraft operated by the European Space Agency (ESA) from 2009 to 2013; and the European Extremely Large Telescope (E-ELT).The Astronomical Observatory of Trieste is integrated with all the major local scientific institutions in and around Trieste (the AREA Science Park, the International School for Advanced Studies and the University of Trieste) and cooperates with major national and international astronomical institutions, such as the Italian Space Agency (ASI) and the European Space Agency (ESA).

Astronom

Astronomical maser

Astronomical algorithms

Astronomical meridian plane

"National Register of Historic Places Inventory-Nomination Form-University of Illinois Astronomical Observatory."

The Astronomical Observatory of Capodimonte (Italian: Osservatorio Astronomico di Capodimonte) is an astronomical observatory owned and operated by Italy's Istituto Nazionale di Astrofisica (National Institute for Astrophysics, INAF). It is located in Naples, Italy, on the hill of Capodimonte.

The Astronomical Society of the Pacific (ASP) is a scientific and educational organization, founded in San Francisco on February 7, 1889. Its name derives from its origins on the Pacific Coast, but today it has members all over the country and the world.

Astronomical Society of India

Astronomical Institute Anton Pannekoek

Astronium graveolens

Astronomical J.

Astronomical precession

Astronomical dawn

Astronidium saccatum

The astronomical system of units, formally called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy. It was adopted by the International Astronomical Union (IAU) in 1976, and has been significantly updated in 1994 and 2009 (see astronomical constant).The system was developed because of the difficulties in measuring and expressing astronomical data in International System of Units (SI units). In particular, there is a huge quantity of very precise data relating to the positions of objects within the solar system which cannot conveniently be expressed or processed in SI units. Through a number of modifications, the astronomical system of units now explicitly recognizes the consequences of general relativity, which is a necessary addition to the International System of Units in order to accurately treat astronomical data.The astronomical system of units is a tridimensional system, in that it defines units of length, mass and time. The associated astronomical constants also fix the different frames of reference that are needed to report observations. The system is a conventional system, in that neither the unit of length nor the unit of mass are true physical constants, and there are at least three different measures of time.

Melbourne Vic 3001 Australia

Astronomical Netherlands Satellite

Astronomical telescope

Another meaning is "Engineering of astronomical instruments"Engineering on an astronomical scale, or astronomical engineering, i.e., engineering involving operations with whole astronomical objects (planets, stars, etc.), is a known theme in science fiction, as well as a matter of recent scientific research and exploratory engineering.

Astronomical polar night

The Astronomical Institute of the Czech Academy of Sciences was founded in 1954. Currently, it has its headquarters in Ondřejov observatory, roughly 35 km south-east from Prague and its director is Vladimír Karas.

Astronomers of the Soviet Union

Astronomical Society of Australia

Astronomical Calculation Institute (University of Heidelberg)

An astronomical constant is a physical constant used in astronomy. Formal sets of constants, along with recommended values, have been defined by the International Astronomical Union (IAU) several times: in 1964 and in 1976 (with an update in 1994). In 2009 the IAU adopted a new current set, and recognizing that new observations and techniques continuously provide better values for these constants, they decided to not fix these values, but have the Working Group on Numerical Standards continuously maintain a set of Current Best Estimates. The set of constants is widely reproduced in publications such as the Astronomical Almanac of the United States Naval Observatory and HM Nautical Almanac Office.Besides the IAU list of units and constants, also the International Earth Rotation and Reference Systems Service defines constants relevant to the orientation and rotation of the Earth, in its technical notes.The IAU system of constants defines a system of astronomical units for length, mass and time (in fact, several such systems), and also includes constants such as the speed of light and the constant of gravitation which allow transformations between astronomical units and SI units. Slightly different values for the constants are obtained depending on the frame of reference used. Values quoted in barycentric dynamical time (TDB) or equivalent time scales such as the Teph of the Jet Propulsion Laboratory ephemerides represent the mean values that would be measured by an observer on the Earth's surface (strictly, on the surface of the geoid) over a long period of time. The IAU also recommends values in SI units, which are the values which would be measured (in proper length and proper time) by an observer at the barycentre of the Solar System: these are obtained by the following transformations: τ A ( S I ) = ( 1 + L B ) 1 3 τ A ( T D B ) {\displaystyle \tau _{A}({\rm {SI}})=(1+L_{\rm {B}})^{\frac {1}{3}}\tau _{A}({\rm {TDB}})\,} G E ( S I ) = ( 1 + L B ) G E ( T D B ) {\displaystyle GE({\rm {SI}})=(1+L_{\rm {B}})GE({\rm {TDB}})\,} G S ( S I ) = ( 1 + L B ) G S ( T D B ) {\displaystyle GS({\rm {SI}})=(1+L_{\rm {B}})GS({\rm {TDB}})\,}

Polish

Astronomische Gesellschaft Katalog

Ultraviolet

Astronium lecointei (Goncalo alves, Portuguese common name Muiracatiara) is a timber tree, which is native to Brazil.

Sic itur ad astra

Astronomical Clock

Astronomical observation

Astronomical ecliptic

Astronomical observatory of lisbon

Astronomical Society of Glasgow

Astronomia nova (English: New Astronomy, full title in original Latin: Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe) is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars.

Astronomical Society of South Australia

Astronomical image processing

Astronomical catalog

Astronomical albedo

X-ray and ultraviolet

LR/lc

Astronomical twillight

Astronomical constant

Astronomical theory of climate change

oil on canvas

Astronomia nova (English: New Astronomy)

Moonchild: Songs Without Words

A. victoriae

Astronom Kopernik, czyli rozmowa z Bogiem

Astronomical group

Astronium fraxinifolium is a timber tree, which is native to Amazon Rainforest, Atlantic Forest, Caatinga, and Cerrado vegetation in Brazil. Common names include kingwood, locustwood, tigerwood, and zebrawood. It is known in Portuguese as Goncalo alves. This plant is cited in Flora Brasiliensis by Carl Friedrich Philipp von Martius. It is also used to make hardwood such as Tigerwood.

Astronomer (Wild Cards)

Astronomical summer

Astronomical Multi-Beam Recombiner

Astronomical observatory of capodimonte

Astronomical Society of the Pacific Conference Series (ASPCS)

Astronomiska observatoriet i Uppsala

The Astronomical Calculation Institute (German: Astronomisches Rechen-Institut; ARI) is a research institute in Heidelberg, Germany, dating from the 1700s. Beginning in 2005, the ARI became part of the Center for Astronomy at Heidelberg University (Zentrum für Astronomie der Universität Heidelberg, ZAH). Previously, the institute directly belonged to the state of Baden-Württemberg.

An astronomical survey is a general map or image of a region of the sky which lacks a specific observational target. Alternatively, an astronomical survey may comprise a set of many images or spectra of objects which share a common type or feature. Surveys are often restricted to one band of the electromagnetic spectrum due to instrumental limitations, although multiwavelength surveys can be made by using multiple detectors, each sensitive to a different bandwidth.

In astronomy, nutation is a phenomenon which causes the orientation of the axis of rotation of a spinning astronomical object to vary over time. It is caused by the gravitational forces of other nearby bodies acting upon the spinning object. Although they are essentially the same effect operating over different timescales, astronomers usually make a distinction between precession, which is a steady long-term change in the axis of rotation, and nutation, which is the combined effect of similar shorter-term variations.An example of precession and nutation is the variation over time of the orientation of the axis of rotation of the Earth. This is important because the most commonly used frame of reference for measurement of the positions of astronomical objects is the Earth's equator — the so-called equatorial coordinate system. The effect of precession and nutation causes this frame of reference itself to change over time, relative to an arbitrary fixed frame.Nutation is one of the corrections which must be applied to obtain the apparent place of an astronomical object. When calculating the position of an object, it is initially expressed relative to the mean equinox and equator — defined by the orientation of the Earth's axis at a specified date, taking into account the long-term effect of precession, but not the shorter-term effects of nutation. It is then necessary to apply a further correction to take into account the effect of nutation, after which the position relative to the true equinox and equator is obtained.Because the dynamic motions of the planets are so well known, their nutations can be calculated to within arcseconds over periods of many decades. There is another disturbance of the Earth's rotation called polar motion that can be estimated for only a few months into the future because it is influenced by rapidly and unpredictably varying things such as ocean currents, wind systems, and hypothesised motions in the liquid nickel-iron outer core of the Earth.

Astronidium saulae is a species of plant in the Melastomataceae family. It is endemic to Fiji.

Astronidium saccatum is a species of plant in the Melastomataceae family. It is endemic to French Polynesia.

The Astronomical Netherlands Satellite (ANS; also known as Astronomische Nederlandse Satelliet) was a space-based X-ray and ultraviolet telescope. It was launched into Earth orbit on 30 August 1974 at 14:07:39 UTC in a Scout rocket from Vandenberg Air Force Base, United States. The mission ran for 20 months until June 1976, and was jointly funded by the Netherlands Institute for Space Research (NIVR) and NASA.

Astronomica (disambiguation)

Astronomical timer

Astroniks

Astronium juglandifolium

Astronomical Observatory of Trieste (Italian: Osservatorio Astronomico di Trieste or OAT) is an astronomical center of studies located in the city of Trieste in northern Italy.The observatory traces its origins from the Nautical School founded in Trieste by the Empress Maria Theresa of Austria in 1753.

Astronomical society of southern africa

Astronomical twilight

The Astronomical Society of the Pacific (ASP) is a scientific and educational organization, founded in San Francisco on February 7, 1889. Its name derives from its origins on the Pacific Coast, but today it has members all over the country and the world. It has the legal status of a nonprofit organization.It is the largest general astronomy education society in the world, with members from over 40 countries.The ASP's goal is to promote public interest in and awareness of astronomy (and increase scientific literacy) through its publications, web site, and many educational and outreach programs. These include:Project ASTRO - a national program that improves the teaching of astronomy and physical science (using hands-on inquiry-based activities) by pairing amateur and professional astronomers with 4th through 9th grade teachers and classes.Family ASTRO - a project that develops kits and games to help families enjoy astronomy in their leisure time and trains astronomers, educators, and community leadersAstronomy from the Ground Up - a national program to help educators at smaller science museums, nature centers and environmental education organizations create or enhance astronomy education programs.The Night Sky Network - a program with the Jet Propulsion Laboratory that supports a community of over 450 amateur astronomy clubs around the U.S. in public outreach activities, providing them with kits and training. The clubs have sky gazing events, solar viewings, and give presentations for the public.Classroom materials and resources in astronomy (many developed by the Society's educational staff) sold through their online AstroShop or made available free through their web siteThe ASP assists with astronomy education and outreach by partnering with other organizations both in the United States and internationally, and organizes an annual meeting to promote the appreciation and understanding of astronomy.Presidents of the ASP have included such notable astronomers as Edwin Hubble, George O. Abell, and Frank Drake. George Pardee, who later became Governor of the State of California, served as president in 1899.

Astronomer Royal for Scotland

Hard X-Ray

Astronomer Copernicus, or Conversations with God

Astronomical observatories in Washington, D.C.

Astronomers and Astrophysicists

Astronomical calendars

Astronomical observatories

Astronomer of Limoges

Astronomische Nederlandse Satellite

Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe (English: New Astronomy, Based upon Causes, or Celestial Physics, Treated by Means of Commentaries on the Motions of the Star Mars, from the Observations of Tycho Brahe, Gent)

Astronomical society

Astronomical club

Astronomia nova

Astronomers of the USSR

Executive Director

Astronomers Telegram

Astronomical clock (Besancon)

Tom Meneghini

Astronomical Units

One People, One Sky

Astronomical clocks

Moonchild

Astronomical Observatory of Palermo

non-profit Incorporated association

Astronomical Julian calendar

Astronomical Society of New South Wales

FORTRAN and C

John Spencer

Astronomical instruments

Uninhabited

Kalemegdan Belgrade2.jpg

Astronomica: The Quest for the Edge of the Universe is an educational game made by Hyper-Quest, Inc. in 1994 for Macintosh and Windows 3.x. The game developers purposely made the game's main character a girl, explaining "Younger girls are often left out of multimedia games, so we made the main character in Astronomica a girl".

Founder & President

Astronomical observatories in the United States

An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets.

Astronomical day

Dr. Linda Shore

Astronomical Notes

Astronomical Observatory of Farra d'Isonzo

Astronomers Without Borders (AWB) is a United States organization founded by Mike Simmons and Anousheh Ansari, dedicated to spreading astronomy throughout the world, by getting people in developed countries to sponsor the purchase of equipment and training for people in undeveloped countries.

*Astronium zongolicum (Reko) nom. illeg.

Astronoka

Astronomical surveys

Astronomus

Astronomische Nederlandse Satelliet

Astronomica: The Quest for the Edge of the Universe

Mike Simmons

In astronomy, nutation is a phenomenon which causes the orientation of the axis of rotation of a spinning astronomical object to vary over time. It is caused by the gravitational forces of other nearby bodies acting upon the spinning object.

Astronomical Society of the Pacific Leaflets

Astronomical Acronyms

The Astronomische Gesellschaft Katalog (AGK) is an astrometric star catalogue. Compilation for the first version, AGK1, was started in 1861 by Friedrich Argelander and published between 1890 and 1954, listing 200 000 stars down to ninth magnitude.The second version, AGK2, was started in the 1920s, and published between 1951 and 1958 using photographic data obtained from the Bonn and Hamburg Observatories.The third version, AGK3, was started in 1956 and published in 1975.

Astronomer Copernicus, or Conversations with God (Polish: Astronom Kopernik, czyli rozmowa z Bogiem) is an oil painting by the Polish artist Jan Matejko, finished in 1873, depicting Nicolaus Copernicus observing the heavens from a balcony by a tower near the cathedral in Frombork (seen in the back).

Astronomical Observatory, Belgrade

Astronomical Calculation Institute (Heidelberg University)

Astronomical Society Ruđer Bošković

Astronomical units of length

Astronomical imaging

Astronomical system of units

Astronomical society of the pacific

Astronomical society of negara brunei darussalam

Astronomia

Astronomical calendars on Gotland

An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. Astronomical catalogs are usually the result of an astronomical survey of some kind.

worldwide

Astronomical catalogues

Astronomical calendar

In ancient times, only the Sun and Moon, a few hundred stars and the most easily visible planets had names. Over the last few hundred years, the number of identified astronomical objects has risen from hundreds to over a billion, and more are discovered every year.

Astronomical naming convention

Astronomers Without Borders (AWB) is a United States organization founded by Mike Simmons and Anousheh Ansari, dedicated to spreading astronomy throughout the world, by getting people in developed countries to sponsor the purchase of equipment and training for people in undeveloped countries. The group's aim is to create "goodwill and understanding" across all boundaries through the sharing of astronomy.The group was founded in 2007, and achieved official tax-free status in 2009, which was the International Year of Astronomy (IYA2009). AWB sponsored several events that year, including "The World at Night" and the 100 Hours of Astronomy IYA2009 Global Cornerstone Project. Utilizing important historical and natural settings across the globe, The World at Night created wide-angle images of the sky, in order to show the universality of star gazing. 100 Hours of Astronomy ran from April 2–5, 2009, the goal of which was to get as many people across the world to look through a telescope. The World at Night was the idea of Simmons and Babak A. Tafreshi, the editor of Iran's Nojum Magazine, the only astronomy magazine in the Middle East.The group organizes Global Astronomy Month each April.

Astronomical naming conventions

The Astronomical Society of New South Wales (ASNSW) is an amateur astronomy club in the state of New South Wales, Australia. It was founded in 1954 and it has over 400 members.The Society's objectives are stated in its constitution as follows: "The ASNSW exists to bring together people interested in Astronomy and related sciences, and to promote public interest and education in Astronomy.

The Astronomical Society of Australia (ASA) is the professional body representing astronomers in Australia. Established in 1966, it is incorporated in the Australian Capital Territory. Membership of the ASA is open to people "capable of contributing to the advancement of astronomy or a closely related field". This means that the members are mainly active professional astronomers and postgraduate students.

Astronomical nutation

Astronomical opposition

Astronomické observatórium Modra-Piesok

LR/nt

Astronomer Royal for Scotland was the title of the director of the Royal Observatory, Edinburgh until 1995. It has since been an honorary title.The following have served as Astronomers Royal for Scotland:1834–1844 Thomas Henderson1846–1888 Charles Piazzi Smyth1889–1905 Ralph Copeland1905–1910 Sir Frank Watson Dyson1910–1937 Ralph Allen Sampson1938–1955 William Michael Herbert Greaves1957–1975 Hermann Brück1975–1980 Vincent Cartledge Reddish1980–1990 Malcolm Longair1991–1995 In abeyance1995–present John Campbell Brown

Calabasas, California

*Myracrodruon balansae ( Santin)

Astronomical Image-Processing System

Astronomical Diaries

University of Illinois

Astronomical conjunction

Astronomical objects

Astronomical Observatory of Lisbon

Astronomical Complex

nhl

Astronik

Astronome is an album by John Zorn featuring the "Moonchild Trio" of Joey Baron, Mike Patton and Trevor Dunn. It is the second album by the trio, following Moonchild: Songs Without Words.Theater director Richard Foreman staged an opera Astronome: A Night at the Opera: An Initiation based on this album which premiered at the Ontological-Hysteric Theater on February 5, 2009 and ran through April 5, 2009.

Astronomical masers

Astronomical+Society+of+the+Pacific

Astronomical theory of paleoclimates

The Astronomical Society of India (ASI) is an Indian society of professional astronomers and other professionals from related disciplines. It was founded in 1972, with Vainu Bappu being the founder President of the Society, and as of 2010 has a membership of approximately 1000. Its registered office is at the Astronomy Department, Osmania University, Hyderabad, India. Its primary objective is the promotion of Astronomy and related branches of science. It organises meetings, supports and tries to popularise Astronomy and related subjects and publishes the Bulletin of the Astronomical Society of India.Prof. Rajaram Nityananda of the National Centre for Radio Astrophysics at the Tata Institute of Fundamental Research, Ganeshkhind, Pune is the Society's President.The Society makes a series of awards, the most prestigious of which is the Prof. M. K. Vainu Bappu Gold Medal awarded once every two years to "honour exceptional contributions to Astronomy and Astrophysics by young scientists anywhere in the world." Previous award winners include:1986 Yasuo Fukui1988 George Efstathiou and Shrinivas Kulkarni1990 D.J. Saikia and Dipankar Bhattacharya1992 Pawan Kumar1994 Matthew Colless1996 Sarbani Basu1998 Peter Martinez2000 Biswajit Paul and Alycia J. Weinberger2002 Brian P. Schmidt2004 R. Srianand and Ray Jayawardhana2006 Banibrata Mukhopadhyay2008 Niayesh Afshordi and Nissim Kanekar2010 Marta Burgay and Parampreet SinghThe Society also runs two prestigious lectures: the Modali Endowment Lecture and the R. C. Gupta Endowment Lecture.

Astronomical Spectroscopy

Astronomical objects proposed in religion, astrology and ufology

Astronomer's Telegram

Astronomer Royal for Scotland was the title of the director of the Royal Observatory, Edinburgh until 1995.

Astronomical Society of London

Astronomical Center of Shumen University

See text

Astronomical Institute of Czech Academy of Sciences

Astronomical Dawn

Illinois#USA

The Astronomical Society of Australia (ASA) is the professional body representing astronomers in Australia. Established in 1966, it is incorporated in the Australian Capital Territory. Membership of the ASA is open to people "capable of contributing to the advancement of astronomy or a closely related field". This means that the members are mainly active professional astronomers and postgraduate students. Some retired astronomers and distinguished amateur astronomers are also members, and several organisations are corporate members of the Society. The ASA currently has around 600 members. It publishes a peer-reviewed journal, Publications of the Astronomical Society of Australia.

Astronomisches Rechen-Institut

Astronomical radio interferometry

Astronium lecointei

Astronomically-large

Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe

Astronomical photography

Astronomical map

Astronomical interferometry

Left: Despot Stefan Tower in Belgrade Fortress, the seat of the Society

Astronomic

ASP

The Astronomical Netherlands Satellite (ANS; also known as Astronomische Nederlandse Satelliet) was a space-based X-ray and ultraviolet telescope. It was launched into Earth orbit on 30 August 1974 at 14:07:39 UTC in a Scout rocket from Vandenberg Air Force Base, United States. The mission ran for 20 months until June 1976, and was jointly funded by the Netherlands Institute for Space Research (NIVR) and NASA. ANS was the first Dutch satellite, and the Main Belt asteroid 9996 ANS was named after it.The telescope had an initial orbit of with a periapsis of 266 kilometres (165 mi), an apoapsis of 1,176 kilometres (731 mi), with inclination 98.0° and eccentricity 0.064048, giving it a period of 99.2 minutes. The orbit was sun-synchronous, and the attitude of the spacecraft could be controlled through reaction wheels. The momentum stored in the reaction wheels throughout the orbit was regularly dumped via magnetic coils that interacted with the Earth's magnetic field. The satellite also had two masses that were released shortly after orbit injection, to remove most of the satellite's angular momentum induced by the launcher. The attitude could be measured by a variety of techniques, including solar sensors, horizon sensors, star sensors and a magnetometer.ANS could measure X-ray photons in the energy range 2 to 30 keV, with a 60 cm2 detector, and was used to find the positions of galactic and extragalactic X-ray sources. It also measured their spectra, and looked at their variations over time. It discovered X-ray bursts, and also detected X-rays from Capella.ANS also observed in the ultraviolet part of the spectrum, with a 22 cm (260 cm2) Cassegrain telescope. The wavelengths of the observed photons were between 150 and 330 nm, with the detector split into five channels with central wavelengths of 155, 180, 220, 250 and 330 nm. At these frequencies it took over 18,000 measurements of around 400 objects.

Astronomer Royal

Astronomical optical interferometry

NIVR / NASA

Astronomical year

Location in Nunavut

Astronomia nova (English: New Astronomy, full title in original Latin: Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe) is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars. One of the most significant books in the history of astronomy, the Astronomia nova provided strong arguments for heliocentrism and contributed valuable insight into the movement of the planets. This included the first mention of the planets' elliptical paths and the change of their movement to the movement of free floating bodies as opposed to objects on rotating spheres. It is recognized as one of the most important works of the scientific revolution.

An astronomical constant is a physical constant used in astronomy. Formal sets of constants, along with recommended values, have been defined by the International Astronomical Union (IAU) several times: in 1964 and in 1976 (with an update in 1994).

Astronomia Nova

Astronomicke observatorium Modra-Piesok

Astronomer Royal is a senior post in the Royal Households of the United Kingdom. There are two officers, the senior being the Astronomer Royal dating from 22 June 1675; the second is the Astronomer Royal for Scotland dating from 1834.The post was created by King Charles II in 1675, at the same time as he founded the Royal Observatory Greenwich.

Astronomers of Russia

scientific research and public education in astronomy

Astronomical meridian

Six Litanies for Heliogabalus

Astronomical Observatory of Trieste

The Astronomical Society Islands are members of the Canadian Arctic Archipelago in the territory of Nunavut. They are located in western Gulf of Boothia at the mouth of Lord Mayor Bay. The group is near the Boothia Peninsula and south of the Copeland Islands.

Astronomical atlases

Astronomical Observatory (University of Illinois at Urbana–Champaign)

Astronomic meridian

Astronomical Observatory of Córdoba

The Astronomical Institute of Slovak Academy of Sciences was founded in 1953, when the state observatory on Skalnaté Pleso (founded in 1943 by Dr. Bečvář) got a status of astronomical institute and became one of the founding institutes of the newly born Slovakian Academy of Sciences. In memories of past and current employees, the institute and the observatory on Skalnaté Pleso were always blended in one and therefore one could consider for the year of the institute foundation already the 1943. Currently, it has its headquarters at Tatranská Lomnica.

Astronomer Copernicus, or Conversations with God (Polish: Astronom Kopernik, czyli rozmowa z Bogiem) is an oil painting by the Polish artist Jan Matejko, finished in 1873, depicting Nicolaus Copernicus observing the heavens from a balcony by a tower near the cathedral in Frombork (seen in the back). Currently the painting is in the collection of the Jagiellonian University of Kraków, which purchased it from a private owner with money donated by the Polish public.The painting presently adorns the Aula of the Collegium Novum of the University. As with many other works, Matejko painted his artwork in 1872 as part of a series of paintings intended to represent profound moments in the history of Poland.

Astronomer royal for scotland

Astronomical time

Astronomica

Astronomicon

Astronomer-royal

Astronomically large