The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
There are two golf balls sitting on the moon.
721
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
41% of the moon is not visible from earth at any time.
103