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- Astronomical_system_of_units abstract "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.".
- Astronomical_system_of_units wikiPageExternalLink asa.usno.navy.mil.
- Astronomical_system_of_units wikiPageExternalLink Astronomical_Constants_2014.pdf.
- Astronomical_system_of_units wikiPageExternalLink measuring.
- Astronomical_system_of_units wikiPageID "471476".
- Astronomical_system_of_units wikiPageRevisionID "593541429".
- Astronomical_system_of_units date "February 2013".
- Astronomical_system_of_units hasPhotoCollection Astronomical_system_of_units.
- Astronomical_system_of_units inaccurate "yes".
- Astronomical_system_of_units subject Category:Systems_of_units.
- Astronomical_system_of_units subject Category:Units_of_measurement_in_astronomy.
- Astronomical_system_of_units type Artifact100021939.
- Astronomical_system_of_units type Instrumentality103575240.
- Astronomical_system_of_units type Object100002684.
- Astronomical_system_of_units type PhysicalEntity100001930.
- Astronomical_system_of_units type System104377057.
- Astronomical_system_of_units type SystemsOfUnits.
- Astronomical_system_of_units type Whole100003553.
- Astronomical_system_of_units comment "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).".
- Astronomical_system_of_units label "Astronomical system of units".
- Astronomical_system_of_units label "Astronomiczne jednostki odległości".
- Astronomical_system_of_units label "Astronomische Maßeinheiten".
- Astronomical_system_of_units label "Sistema astronómico de unidades".
- Astronomical_system_of_units label "Sistema astronômico de unidades".
- Astronomical_system_of_units label "Système astronomique d'unités".
- Astronomical_system_of_units sameAs Astronomické_jednotky_délky.
- Astronomical_system_of_units sameAs Astronomische_Maßeinheiten.
- Astronomical_system_of_units sameAs Sistema_astronómico_de_unidades.
- Astronomical_system_of_units sameAs Système_astronomique_d'unités.
- Astronomical_system_of_units sameAs Astronomiczne_jednostki_odległości.
- Astronomical_system_of_units sameAs Sistema_astronômico_de_unidades.
- Astronomical_system_of_units sameAs m.0hzn3mq.
- Astronomical_system_of_units sameAs Q751930.
- Astronomical_system_of_units sameAs Q751930.
- Astronomical_system_of_units sameAs Astronomical_system_of_units.
- Astronomical_system_of_units wasDerivedFrom Astronomical_system_of_units?oldid=593541429.
- Astronomical_system_of_units isPrimaryTopicOf Astronomical_system_of_units.