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
The earth travels through space at 660,000 miles per hour.
189
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
Today's top fuel dragsters take off with more force than the space shuttle.
120
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
If two pieces of metal touch in space, they become permanently stuck together.
808
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175