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Stellar classification - Wikipedia
5 天之前 · In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism …
List of proper names of stars - Wikipedia
2025年2月10日 · Of the roughly 10,000 stars visible to the naked eye, only a few hundred have been given proper names in the history of astronomy. [a] Traditional astronomy tends to group …
Sun - Wikipedia
3 天之前 · The Sun has a stellar magnetic field that varies across its surface. Its polar field is 1–2 gauss (0.0001–0.0002 T ), whereas the field is typically 3,000 gauss (0.3 T) in features on the …
Wolf–Rayet star - Wikipedia
5 天之前 · The classification of Wolf–Rayet spectra is complicated by the frequent association of the stars with dense nebulosity, dust clouds, or binary companions.
Betelgeuse - Wikipedia
4 天之前 · Betelgeuse is a red supergiant star in the constellation of Orion.It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its constellation.It is a …
Star - Spectra, Classification, Evolution | Britannica
6 天之前 · Star - Spectra, Classification, Evolution: A star’s spectrum contains information about its temperature, chemical composition, and intrinsic luminosity. Spectrograms secured with a …
Star formation and evolution - Encyclopedia Britannica
6 天之前 · stellar evolution (more) Throughout the Milky Way Galaxy (and even near the Sun itself), astronomers have discovered stars that are well evolved or even approaching …
Star - Pulsation, Variability, Luminosity | Britannica
6 天之前 · Star - Pulsation, Variability, Luminosity: An impressive body of evidence indicates that stellar pulsations can account for the variability of Cepheids, long-period variables, …
Star - Fusion, Energy, Structure | Britannica
6 天之前 · Providing yet another relation of stellar structure, this equation uses the following important quantities: a, the radiation constant noted above; c, the velocity of light; ρ, the …
Star - Fusion, Hydrogen, Nuclear | Britannica
6 天之前 · An early assumption that stars have a uniform chemical composition throughout their interiors simplified the calculations considerably, but it had to be abandoned when studies in …
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