On Mars, the force of gravity is only about 38% that of Earth's. That means if you weighed 50 kg on Earth, you'd only weigh about 19 kg on Mars!
Earth spins to the east, which is why the sun rises in the east. In fact, so does every planet except Venus.
It takes about 1.255 seconds for moonlight to reach Earth. That means that when we look at the moon, we're really seeing what the moon looked like over a second ago!
A micrometeorite is an extra-terrestrial dust particle, measuring from about 50 nm (nanometers, or millionths of a meter) to 2 mm. Astronomers believe that more than 3,000 micrometeorites fall to earth every second.
A single solar flare can release the energy equivalent of 100 atomic bombs exploding all at once.
There are more than one sextillion stars in space... that's 1,000,000,000,000,000,000,000.
Think the Milky Way is big? The universe is made up of over 50 billion galaxies.
Atmospheric pressure is so strong on Saturn that some scientists think up to 1 million kilograms of diamonds may fall as precipitation there each year.