The astronomical unit (or AU) is defined as approximately the mean distance between the Earth and the Sun. It is defined as 149,597,870,700 meters or approximately 93 million miles. At this distance, it takes slightly more than 8 minutes and 19 seconds for light to travel between the Sun and the Earth (or 1 AU). AU is one method of (continued...) https://sciencecards.org/what-is-an-astronomical-unit-au/ #science #sciencefacts #noaifacts