Sound doesn't travel in space.
255
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
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
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Jupiter is bigger than all the other planets combined.
254
A 100-pound person on Earth would weigh 38 pounds on Mars.
102