The story
Named for Eugène Michel Antoniadi (1870-1944), who invented it.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: a scale of seeing conditions used by amateur astronomers. Full definition →
Named for Eugène Michel Antoniadi (1870-1944), who invented it.
Etymology from Wiktionary, CC BY-SA 4.0.