Jupiter is bigger than all the other planets combined.
254
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Lightning strikes about 6,000 times per minute on this planet!
158
Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The earth rotates more slowly on its axis in March than in September.
145
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The earth travels through space at 660,000 miles per hour.
189