Sound doesn't travel in space.
255
Jupiter is bigger than all the other planets combined.
254
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Earth is the only planet in our solar system that's not named after a god or goddess.
17
It would take more than 150 years to drive a car to the sun.
569
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
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