A comet's tail always points away from the sun.
2
Summer on Uranus lasts for 21 years.
358
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.
14
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
The heart of an astronaut actually gets smaller when in outer space.
216
Astronauts get taller when they are in space.
224