名次后缀 发表于 2025-3-23 12:37:55
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,Space – The Great Radiation Field,ide, the space between galaxies, between stars, and even between the particles, molecules, and atoms of the interstellar medium contains an endless river of radiation – electromagnetic radiation, which in this chapter we’ll simply call “light.” What’s more, aside from the cosmic microwave backgroundLAY 发表于 2025-3-24 05:22:34
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,First Look Inside a Star – The Atmosphere,s some kind of precisely defined surface, like the surface of a planet. However, all stars including the Sun are entirely gaseous, and the photosphere consists of what amounts to the inner part of a star’s surface layers – in effect, its atmosphere. It is a layer of gas of finite depth that is relatlavish 发表于 2025-3-24 15:20:05
Deep Inside a Star,am is the bit that lies above the main sequence. Here we find most of the intrinsically variable single stars, and what’s more, the light variations of these stars are largely due to things that are going on beneath their surface layers. In some cases, for example, with Cepheid variable stars, the pLiving-Will 发表于 2025-3-24 21:11:43
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,A Star Story − 10 Billion Years in the Making,f the Renaissance in Europe, when the stars were first suspected as being distant suns. Over the centuries the “script” has been written by countless astronomers, both amateur and professional, some well-known and many unsung heroes. It now stands as one of the greatest of all astronomical tales, eq