Question

What is the Astronomical unit?​

Answer 1

Answer:

The astronomical unit is a unit of length, roughly the distance from Earth to the Sun and equal to about 150 million kilometres or ~8 light minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum to a minimum and back again once each year.

Answer 2

Answer:

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.

Explanation:

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