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Complete Definition of "Antoniadi scale"

English

Etymology
Named for w:Eugène Michel Antoniadi|Eugène Michel Antoniadi, who invented it.
Proper noun
en-proper noun

  1. astronomy a scale of seeing conditions used by amateur astronomers. Its categories are:

I - perfect, without a quiver
II - slight undulations, but with calm periods lasting several seconds
III - moderate, with some greater air movements
IV - poor, with the image in constant movement
V - very bad, making observation difficult

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