The moon is Earth’s closest neighbor. It is the brightest object in the night sky. Scientists have studied the moon for thousands of years. Learn more about the moon.
The moon is about 4½ billion years old. It is made of rock. It is covered with craters. They were made when objects hit the moon’s surface.
SEBASTIEN GABORIT—GETTY IMAGES
The moon has no weather. That means there is no wind or rain. Footprints left by astronauts could last billions of years.
The moon has eight phases. Once a month, we see a full moon. Sometimes we can’t see the moon at all. The shape we see depends on how the Earth, sun, and moon line up.
ALBERTO AGNOLETTO—EYEEM/GETTY IMAGES
Only 12 people have walked on the moon. U.S. astronaut Neil Armstrong was first, in 1969. He took this photo of Edwin “Buzz” Aldrin.
Astronauts first flew to the moon in 1968. That was 50 years ago. The mission was called Apollo 8. One of the astronauts took this famous photo of Earth. What a view!