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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.

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Unidentified Flying Object

Unidentified Flying Object, or UFO, an object or light that cannot be readily explained as being man-made or of natural origin.


 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 »