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 population of the Earth has more than doubled since 1950.
151
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The light hitting the earth right now is 30 thousand years old.
163
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The earth rotates more slowly on its axis in March than in September.
145
The earth travels through space at 660,000 miles per hour.
189