SOLAR SYSTEM

Detailed explanation-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.

Detailed explanation-2: -astronomical unit (AU, or au), a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149, 597, 870.7 km (92, 955, 807.3 miles).

Detailed explanation-3: -The solar system is enormous, and interstellar space is even bigger. One astronomical unit is equal to 150 million kilometers. This makes it much easier to count the distances if they’re in counts of Astronomic Units instead of having to count everything in millions or billions of kilometers.