A map of the Mid-Atlantic Ridge. The Mid-Atlantic Ridge (MAR) is a mid-ocean ridge, a divergent tectonic plate or constructive plate boundary located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.
Since the distances are so large, we usually express them in Astronomical Units (AU). (An AU is the average distance from Earth to the Sun, about 150 million kilometers or 93 million miles.) The table below lists the distance of each planet from the Sun in AU. (Numbers were taken from this page.)
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 Earth's orbit. Rather than being a perfect circle, the Earth moves around the Sun in an extended circular or oval pattern.