Any space vehicle must move at a rate of 7 miles per second in order to escape the earth’s gravitational pull.
Tag: earth
A 100-pound person on Earth would weigh 38 pounds on Mars.
The sun’s total lifetime as a star capable of maintaining a life-bearing Earth is about 11 billion years. Nearly half that time has passed.
41% of the moon is not visible from earth at any time.
There are more than one million animal species on Earth.
