Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Astronauts get taller when they are in space.
224
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
It would take more than 150 years to drive a car to the sun.
569
Mars had an oxygen-rich atmosphere around 4 billion years ago
13