Only 55% of Americans know that the sun is a star.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The light hitting the earth right now is 30 thousand years old.
163
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Jupiter's moon Ganymede, is larger than the planet Mercury!
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