Science | Dictionary | Astronomy Terms

Astronomy terms are used to describe the various phenomena in space. In this section you can learn what every astronomy term means and how it helps us to better understand the cosmos.

Featured
How Deep Impact Works

How do scientists find details about the early days of our solar system? One way is to investigate comets. Find out how the Deep Impact spacecraft fired an impactor into Comet Tempel 1 to get some answers.


What is a light year?

What is a light year? A light year is a way of measuring distance. Learn more about the meaning of the term light year at HowStuffWorks.com. See more »