Mercury the Small

This planet can support temperatures of up to 800 degrees Fahrenheit down to
-290 degrees Fahrenheit. Despite being the closest to the sun, Mercury isn't the hottest planet.
It has a rocky surface, able to stand on, but doesn't have any life that we know of currently.
It has no moon or rings, and not a breathable atmosphere. It is .39 AU away from the Sun,
and is the smallest planet in our solar system. A year on this planet would
take 88 Earth days. It has 2,439.7 kilometers for a radius.