The au is the average distance from the earth to the sun earth makes a complete revolution around the sun every 365 25 days mdash one year earth makes a complete revolution around the sun every.

The planets in order from the sun are mercury venus earth mars jupiter saturn uranus neptune and finally the dwarf planet pluto most people have at least heard about our solar system and the planets in it our solar system is usually gone over in elementary school so you might just need a refresher course about the planets in order in our solar system.

The average distance of the earth from the aun is about 149 6 million km which is also referred to as one astronomical unit au next there is the nature of the earths orbit.

Psp202110 0134 svg parker solar probe mission trajectory and current position parker solar probe distance from sun future orbit past orbit 250 200 150 100 50 0 distance from suns surface r s 0 500 1000 1500 2000 2500 days from launch mercury venus earth solar probe parker heliocentric velocity km s 14 88 distance from sun center au 0.