It revolves around the Sun in slightly more than 365 days and rotates every 23.9 hours. Earth is the only celestial body in our solar system with liquid water, able to sustain life.
Earth is primarily an oxygen, nitrogen atmosphere.
Oxygen makes up 21 percent of the atmosphere, with nitrogen taking up nearly the rest. No other planet in the solar system even comes close to having a 21 percent oxygen content. The atmosphere is thick, extending upward around 100 miles, although becomes less dense rapidly above 20,000 feet. The atmosphere is able to protect life by reducing incoming ultraviolet radiation from the Sun and by vaporizing most meteors through intense heat as they enter our atmosphere. The Earth is characterized by complex weather systems carried by high winds aloft.