Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
It takes eight and a half minutes for light to get from the sun to earth.
159
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Sound doesn't travel in space.
255
Astronauts get taller when they are in space.
224
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 sun is 330,330 times larger than the earth!
190
More than 20 million meteoroids enter Earth's atmosphere every day.
139