Orbital Period
88 days
88 days
36 million miles
1st
The smallest planet in the Solar System, it has a rocky, cratered surface that compares somewhat to the Earth's moon. The planet plays a role in the video games Destiny and Mass Effect as well as in the 2007 film Sunshine.
The NASA spacecraft MESSENGER orbited Mercury several thousand times from 2011 to 2015 before crashing onto the planet's surface.
#6 planet