A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The earth travels through space at 660,000 miles per hour.
189
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Sound doesn't travel in space.
255
A comet's tail always points away from the sun.
2