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1. Know your supernovae | Astronomy.com
... Tonight's Sky . ... Observing . ... Sky this Month . ... Star Atlas . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Get to Know the Night Sky . ... Know your supernovae . ... In 1941, German physicist Rudolph Minkowski proposed a two-level scheme based on the absence (type I) or presence (type II) of strong hydrogen spectral lines when the supernova is at peak brightness. ... Only registered members of Astronomy.com are allowed to comment on this article. ...
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Ссылки http://www.astronomy.com/magazine/2004/08/know-your-supernovae -- 70.9 Кб -- 10.04.2016
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