Comparison of Martian Atmospheric Activity From 1997 and 2001
At the 1997 Mars opposition (left), the planet was approximately 62 million miles (100 million kilometers) from Earth. At the 2001 Mars opposition (right), the planet was approximately 43 million miles (68 million km) from Earth.
The planet has a diameter of 4,222 miles (6,794 km) at the equator.
Photo Credit: J. Bell (Cornell University)