christian viladrich

La protu du 30 mars à la TOA 150

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Planetary Astronomy
Observing, imaging and studying the planets
A comprehensive book about observing, imaging, and studying planets. It has been written by seven authors, all being skillful amateur observers in their respective domains.
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l'image est magnifique ! 

Les protubérances nous renseignent sur quels phénomènes solaires ? 

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