Earth's Moon

Meteorites and asteroids have bombarded the Moon for billions of years, leaving deep craters on its surface. Without the forces of weather to remove them, the craters act as a record of all of these impacts. Many of its craters and mountains can be seen with the naked eye! In fact, some people think that these features resemble a man's face. What do you see when you look at the Moon?

Diameter: 2,200 miles
Average Distance from the Earth: 240,000 miles
Average Surface Temperature: -4 degrees F
Orbital Period: 29.5 days
First human landing: July 20, 1969
Characteristics: rocky surface is covered with light-colored highlands, mountains, and darker, lava-filled craters
Significance: Earth's only natural satellite

Image credits: courtesy of USGS; Mordecai-Mark MacLow: AMNH.