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The Collaborative International Dictionary
Counterglow

Counterglow \Coun"ter*glow`\, n. (Astron.) An exceedingly faint roundish or somewhat oblong nebulous light near the ecliptic and opposite the sun, best seen during September and October, when in the constellations Sagittarius and Pisces. Its cause is not yet understood. Called also Gegenschein.

Wiktionary
counterglow

n. The gegenschein.

WordNet
counterglow

n. a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space [syn: gegenschein]

Usage examples of "counterglow".

Barnard has more recently devoted much attention to the Zodiacal Light, as well as to a strange attendant phenomenon called the ``Gegenschein,'' or Counterglow, because it always appears at that point in the sky which is exactly opposite the sun.