A comet's tail always points away from the sun.
2
Astronauts cannot burp in space.
232
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The light hitting the earth right now is 30 thousand years old.
163
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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