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Astro*Dictionary by Michael Erlewine





1 article for "Perpetual Day"

Perpetual Day [Astro*Index]

The phenomenon which occurs in Arctic and Anarctic regions when, for a portion of the year, the Sun never sets. This is due to the tilt of the Earth's spin axis away from the normal to the plane of its orbit about the Sun.

See also:
♦ Axis, Inclination of


Astro*Index Copyright © 1997 Michael Erlewine