The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Sound doesn't travel in space.
255
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Only 55% of Americans know that the sun is a star.
986
If two pieces of metal touch in space, they become permanently stuck together.
808
Earth is the only planet in our solar system that's not named after a god or goddess.
17
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
The earth rotates more slowly on its axis in March than in September.
145