
1) Counterglow 2) Everyday German physics term 3) Familiar German physics term 4) German physics term 5) Light 6) Prevalent German physics term 7) Visible light 8) Visible radiation
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https://www.crosswordclues.com/clue/gegenschein

1) Counterglow
Found on
https://www.crosswordclues.com/clue/gegenschein

Gegenschein (ˈɡeːɡənʃaɪn German for `countershine`) is a faint brightening of the night sky in the region of the antisolar point. == Explanation == Like the zodiacal light, the gegenschein is sunlight backscattered by interplanetary dust. Most of this dust is orbiting the Sun in about the ecliptic plane, with a possible concentration of p.....
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http://en.wikipedia.org/wiki/Gegenschein

glow of zodiacal light seen opposite the sun
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http://phrontistery.info/g.html

oval patch of faint luminosity exactly opposite to the Sun in the night sky. The patch of light is so faint it can be seen only in the absence of ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/g/15

A faint round or oval spot of light, about 20° across, in the midnight sky near the ecliptic and opposite the Sun, best seen under clear, dark conditions in September and October; also called the counterglow (its meaning in German).
Found on
http://www.daviddarling.info/encyclopedia/G/gegenschein.html

A very faint skyglow opposite the Sun, very difficult to observe, caused by very thinly spread interplanetary material. Often known by its English name, Counterglow.
Found on
http://www.encyclo.co.uk/local/20448
[Difficult words] 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
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https://www.vocabulary.com/lists/675557
[Obscure words] 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
Found on
https://www.vocabulary.com/lists/675557
No exact match found.