In this section terms that are frequently used on this site are explained. It will be expanded over time.
|AU (Astronomical Unit)||The astronomical unit (au) is defined by the IAU as exactly 149,597,870,700 m.It is approximately the average distance between the Earth and the Sun (about 150 billion meters).|
The IAU has specified that this term is lower-case “au”, so “AU” is techincally incorrect.
|JPL CNEOS (English)|