Question

What is an astronomical unit?

Answer 1

An astronomical unit (AU) is the average distance between Earth and the Sun, which is about 93 million miles or 150 million kilometers. Astronomical units are usually used to measure distances within our Solar System.

Answer 2

Step-by-step explanation:

The Astronomical Unit (abbreviated AU) is the most used distance unit in the measurement of orbits and trajectories within the Solar System.

The Astronomical Unit is defined as "the distance from the center of the Sun to a particle of small mass that, following a circular orbit, had a translation period of 365.2568983 days." Therefore, 1 AU equals 149,597,870,691 kilometers.

An AU is the average distance between the Earth and the Sun. To simplify, it is often said that 1 AU is approximately 150 million kilometers.