Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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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
The heart of an astronaut actually gets smaller when in outer space.
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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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More than 20 million meteoroids enter Earth's atmosphere every day.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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Astronauts cannot burp in space.
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Pluto is smaller than Russia.
9