Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Lightning strikes about 6,000 times per minute on this planet!
158
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The earth is .02 degrees hotter during a full moon.
157
Jupiter is bigger than all the other planets combined.
254
A comet's tail always points away from the sun.
2
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