The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
More than 20 million meteoroids enter Earth's atmosphere every day.
139
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
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
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