The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
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
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Sound doesn't travel in space.
255
A comet's tail always points away from the sun.
2
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
The population of the Earth has more than doubled since 1950.
151