This instructional activity will help students understand impact craters and infer how they were formed and the reason for their differences in size.

Learn how craters were formed on the moon.

Have you ever heard that the moon is made of cheese? Even though the craters on the surface of the moon resemble holes in Swiss cheese, we know that this common myth is not true. Find out how craters are formed and why they are different...

Find out about why Earth's moon is full of craters, and what happens to asteroids and meteors when they come into contact with Earth.

This is a teacher's guide to a lesson on ecosystems. The objective is for the students to set up their own ecosystem and define the roles of producers, consumers and scavengers.

This Astronomy Picture of the Day is of Crater Copernicus, taken by the Apollo 17 crew in 1972.