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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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Transit

Transit, in astronomy, the passage of one celestial body across the disc (face) of a larger, more distant body, or across the observer's meridian.


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 »