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Astro*Dictionary by Michael Erlewine

 

 

 

 

2 articles for "Illumination, Period of"

Illumination, Period of [Astro*Index]

The time-interval each month (about 26d18h) when the Moon's disk is visible after sunset and before sunrise, thus supplying illumination to the Earth.

See also:
♦ Lunar ♦ Dichotome
Illumination, Period of [DeVore]

That portion of the Moon's orbit, of the duration of approximately 26d 18h, during which it is visible, supplying light after sunset and before sunrise. Obviously it supplies light only to the hemisphere which is turned in its direction; but since the Earth's rotation constantly shifts this hemisphere, the whole of the Earth's surface is illuminated for some portion of every night during this period.

See also:
♦ Lunar ♦ Dichotome

 

Astro*Index Copyright © 1997 Michael Erlewine