What does anthelion mean?
A rare or obsolete term for a sunspot seen on the dark side of the Sun, or a spot on the Moon's surface that appears as a dark spot against the bright lunar surface.
Example
"The astronomer spent years studying the anthelion on the Moon's surface, trying to understand its unique properties."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.