File:Diagram of the life of Sun-like stars.jpg
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[编辑]描述Diagram of the life of Sun-like stars.jpg |
English: Born from clouds of gas and dust, stars like our Sun spend most of their lifetime slowly burning their primary nuclear fuel, hydrogen, into the heavier element helium. After leading this bright and shiny life for several billion years, their fuel is almost exhausted and they start swelling, pushing the outer layers away from what has turned into a small and very hot core. These “middle-aged” stars become enormous, hence cool and red — red giants. All red giants exhibit a slow oscillation in brightness due their rhythmic “breathing” in and out, and one third of them are also affected by additional, slower and mysterious changes in their luminosity. After this rapid and tumultuous phase of their later life, these stars do not end in dramatic explosions, but die peacefully as planetary nebulae, blowing out everything but a tiny remnant, known as white dwarf. |
日期 | |
来源 | http://www.eso.org/public/images/eso0948a/ |
作者 | ESO/S. Steinhöfel |
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[编辑]This media was created by the European Southern Observatory (ESO).
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来源 | European Southern Observatory |
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提供者 | ESO/S. Steinhöfel |
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数据生成日期时间 | 2009年12月7日 (一) 00:00 |
关键词 | Stars |
联系信息 |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |