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
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219