aphelia

aphelion Audio Help (ə-fē'lē-ən) Pronunciation Key

The point at which an orbiting body, such as a planet or comet, is farthest away from the Sun. Compare apogee , perihelion.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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