Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
4
Sound doesn't travel in space.
255
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
A comet's tail always points away from the sun.
2
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Some asteroids have other asteroids orbiting them.
131