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
Lightning strikes about 6,000 times per minute on this planet!
158
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
The light hitting the earth right now is 30 thousand years old.
163
Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Jupiter is bigger than all the other planets combined.
254
41% of the moon is not visible from earth at any time.
103