Venus is the only planet that rotates clockwise.
310
Some asteroids have other asteroids orbiting them.
131
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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 earth rotates more slowly on its axis in March than in September.
145
A 100-pound person on Earth would weigh 38 pounds on Mars.
102