AU meaning in Space Science ?

Answer: What is Astronomical Unit mean?

The astronomical unit (symbol: au, or AU or AU) is a unit of length, roughly the distance from Earth to the Sun and equal to about 150 million kilometres (93 million miles) or ~8 light minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once each year. The astronomical unit was originally conceived as the average of Earth's aphelion and perihelion; however, since 2012 it has been defined as exactly 149597870700 m (see below for several conversions).

The astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the definition of another unit of astronomical length, the parsec.

reference

Full Form	Category
Aarhus Universitet	Academic & Science
Aberdeen University	Academic & Science
Arellano University	Academic & Science
Aberystwyth University	Academic & Science
Aarhus University	Academic & Science
Anderson University	Academic & Science
Alfred University	Academic & Science
Assumption University of Thailand	Academic & Science
Author	Academic & Science
Almeda University	Academic & Science
Adelphi University	Academic & Science
Anadolu University	Academic & Science
Auburn Univirsity	Academic & Science
Absorbance Unit	Academic & Science
Air University	Academic & Science
Athabasca University	Academic & Science
Alfaisal University	Academic & Science
Ashford University	Academic & Science
Aurora University	Academic & Science
Autodesk University	Academic & Science
Academic Unit	Academic & Science
Awkward University	Academic & Science
American University	Academic & Science
Avengers University	Academic & Science
Auburn University	Academic & Science
Andrews University	Academic & Science
Andhra University	Andhra Pradesh State University
AngloGold Ashanti, LTD.	Business
Aero Union Corporation	Business
Gold	Chemistry
American Union	Community
Annotation Unit	Community
Arthur Upfield	Community
Americans United	Community
Auto Union	Community
Access Unit	Computer Hardware
Audio Unit	Computer Hardware
Australia (TLD)	Computing
Authenticated User	Computing
Authorized User	Computing
Australia	Country Names
Au (mobile Phone Company)	Country Specific
AutoCrypto	Cryptocurrency
Automatic Update	Database Management
Atomic Units	Electronics
Arbitrary Unit	Electronics
Sound - Basic 8-bit Compressed Audio File	File Type
Aliens Undercover	General
Armageddon Unlimited	General
Awfully Underwhelming	General
About Uncirculated	General
and AU	General
Alcoholics Unanimous	General
Alternate Universe	General
Alternative Universe	General
Automotive Use	General
Assessment Unit	General
Administrative Units	General
Administration Unit	General
A Unit	General
Astronimcal Unit	General
Authenticity Augmentative	General
Anime Universe	General
Aperture Unit	General
Alianza Unidad	Governmental
African Unity	Governmental
Assam University	Indian Government Central University
University of Allahabad	Indian Government Central University
Anadolu Üniversitesi	International
Atatürk Üniversitesi	International
Ankara Üniversitesi	International
Among Us	Internet
Allocation Unit	Measurement Unit
Astronomical Units	Measurement Unit
Absorbance Units	Measurement Unit
Arbitrary Units	Measurement Unit
Auris Utraque (both ears)	Medical
Analog Applique Unit	Military and Defence
Automatic Updates	Networking
Amiga Usenet	Networking
African Union	Regional
Austral L?eas A?eas	Regional
Austral Líneas Aéreas	Regional
A Australia	Regional
Astronomical Unit	Space Science
Athletic Union	Sports
Audio Units	Telecommunication
Aliah University	West Bengal State University