Astronomy is literally over your head, but this lesson will explain how we study it. Young scientists make telescopes, calculate and compare the light gathering power of lenses, and simulate detection of infared radiation....

What's the difference between a meteor, meteorite, and meteoroid, and exactly how scared should we be? Crash Course explains exactly what happens when earth encounters debris as it plows its course around the sun. [11:21]

Enter our solar system to interact with the planets, moons, asteroids, meteors, and more. Investigate with NASA scientists and explore missions related to space exploration. Read facts, compare statistics, look through resources, and...

A brief vocabulary overview describing the difference between asteroids, comets, and meteors.