Pluto is smaller than Russia.
9
The heart of an astronaut actually gets smaller when in outer space.
216
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
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
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
The light hitting the earth right now is 30 thousand years old.
163
The earth rotates more slowly on its axis in March than in September.
145