Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

International Celestial Reference System

+ Save concept

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU). [1]

19 relations: Astrometry, Astronomical radio source, Astronomy, Barycenter, Barycentric celestial reference system, Celestial coordinate system, Epoch (astronomy), Equatorial coordinate system, Equinox, Hipparcos, International Astronomical Union, International Celestial Reference Frame, International Earth Rotation and Reference Systems Service, International Terrestrial Reference System, Minute and second of arc, Quasar, Right ascension, Solar System, Very-long-baseline interferometry.

Astrometry

Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.

New!!: International Celestial Reference System and Astrometry · See more »

Astronomical radio source

Astronomical radio sources are objects in outer space that emit strong radio waves.

New!!: International Celestial Reference System and Astronomical radio source · See more »

Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

New!!: International Celestial Reference System and Astronomy · See more »

Barycenter

The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.

New!!: International Celestial Reference System and Barycenter · See more »

Barycentric celestial reference system

The Barycentric celestial reference system (BCRS) is a coordinate system used in astrometry to specify the location and motions of astronomical objects.

New!!: International Celestial Reference System and Barycentric celestial reference system · See more »

Celestial coordinate system

In astronomy, a celestial coordinate system is a system for specifying positions of celestial objects: satellites, planets, stars, galaxies, and so on.

New!!: International Celestial Reference System and Celestial coordinate system · See more »

Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

New!!: International Celestial Reference System and Christmas · See more »

Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

New!!: International Celestial Reference System and Christmas and holiday season · See more »

Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

New!!: International Celestial Reference System and Christmas Eve · See more »

Christmas traditions

Christmas traditions vary from country to country.

New!!: International Celestial Reference System and Christmas traditions · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

New!!: International Celestial Reference System and Epoch (astronomy) · See more »

Equatorial coordinate system

The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.

New!!: International Celestial Reference System and Equatorial coordinate system · See more »

Equinox

An equinox is commonly regarded as the moment the plane (extended indefinitely in all directions) of Earth's equator passes through the center of the Sun, which occurs twice each year, around 20 March and 22-23 September.

New!!: International Celestial Reference System and Equinox · See more »

Hipparcos

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

New!!: International Celestial Reference System and Hipparcos · See more »

International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

New!!: International Celestial Reference System and International Astronomical Union · See more »

International Celestial Reference Frame

In astrometry, an International Celestial Reference Frame (ICRF) is a realization of the International Celestial Reference System (ICRS) using reference celestial sources observed at radio wavelengths.

New!!: International Celestial Reference System and International Celestial Reference Frame · See more »

International Earth Rotation and Reference Systems Service

The International Earth Rotation and Reference Systems Service (IERS), formerly the International Earth Rotation Service, is the body responsible for maintaining global time and reference frame standards, notably through its Earth Orientation Parameter (EOP) and International Celestial Reference System (ICRS) groups.

New!!: International Celestial Reference System and International Earth Rotation and Reference Systems Service · See more »

International Terrestrial Reference System

The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface.

New!!: International Celestial Reference System and International Terrestrial Reference System · See more »

Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

New!!: International Celestial Reference System and Minute and second of arc · See more »

New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

New!!: International Celestial Reference System and New Year · See more »

New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

New!!: International Celestial Reference System and New Year's Day · See more »

New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

New!!: International Celestial Reference System and New Year's Eve · See more »

Quasar

A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).

New!!: International Celestial Reference System and Quasar · See more »

Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.

New!!: International Celestial Reference System and Right ascension · See more »

Solar System

The Solar SystemCapitalization of the name varies.

New!!: International Celestial Reference System and Solar System · See more »

Very-long-baseline interferometry

Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy.

New!!: International Celestial Reference System and Very-long-baseline interferometry · See more »

2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

New!!: International Celestial Reference System and 2018 · See more »

2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

New!!: International Celestial Reference System and 2019 · See more »

References

[1] https://en.wikipedia.org/wiki/International_Celestial_Reference_System

OutgoingIncoming
Hey! We are on Facebook now! »