Source checked by DailyFact editors
Mercury is the fastest planet
Mercury zips around the Sun every 88 Earth days, faster than any other planet.
Why it is true
It is named for the swiftest of the ancient Roman gods. With no atmosphere to hold heat, its nights can fall to minus 290 degrees Fahrenheit.
Check the source
We keep the original reference beside the claim so you can inspect the evidence and surrounding context yourself.
Open NASA Science
