Astronomical unit facts for kids
Quick facts for kidsAstronomical unit
The grey line indicates the Earth–Sun distance, which on average is about 1 astronomical unit.
|Unit system||Astronomical system of units
(Accepted for use with the SI)
|Symbol||au or AU|
|1 au or AU in ...||... is equal to ...|
|metric (SI) units||978707×1011 m1.495|
|imperial & US units||×107 mi9.2956|
|astronomical units|| ×10−6 pc4.8481
The AU is about 150 million kilometers or 93 million miles. Astronomers usually measure distances within the Solar System in astronomical units. Mars is about 1.4 AU from the Sun, Jupiter lies at roughly 5.2 AU, and Neptune is roughly 30 AU from the Sun. Light travels an AU in about 8.317 minutes.
Astronomical unit Facts for Kids. Kiddle Encyclopedia.