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Astro*Dictionary
by Michael Erlewine

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1 article for
"Periastron"

Periastron [Astro*Index]

The point in the orbit of a binary star where it is closest to its companion star.

See also: ♦ Periapsis ♦ Apoapsis

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