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Gegenschein
Also known as the Counterglow.
The Gegenschein is very faint light seen on the
ecliptic, 180o
from the Sun. It is part
of the zodiacal light and it is a reflection
of light by dust particles in the
ecliptic plane of the
solar system. It is about 15o to
20o across, and it's fainter by a factor of 15 relative to the
zodiacal light. It is best seen
when it is far from the
Milky Way (Galactic plane) in September and
October.
Calculate the Gegenschein Coordinates
Good for 1950 to 2050, based on low accuracy coordinates
of the Sun
Read more (in Hebrew) about the Gegenschein in the Hebrew Astropedia of the TAU AstroClub.
Constructed: November 1998, by: Eran Ofek