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  2. Stellar classification - Wikipedia

    en.wikipedia.org/wiki/Stellar_classification

    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 or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines .

  3. G-type main-sequence star - Wikipedia

    en.wikipedia.org/wiki/G-type_main-sequence_star

    [8] [9] [10] In addition, although the term "dwarf" is used to contrast G-type main-sequence stars with giant stars or bigger, stars similar to the Sun still outshine 90% of the stars in the Milky Way (which are largely much dimmer orange dwarfs, red dwarfs, and white dwarfs which are much more common, the latter being stellar remnants). [11]

  4. Main sequence - Wikipedia

    en.wikipedia.org/wiki/Main_sequence

    At a stellar core temperature of 18 million Kelvin, the PP process and CNO cycle are equally efficient, and each type generates half of the star's net luminosity. As this is the core temperature of a star with about 1.5 M ☉ , the upper main sequence consists of stars above this mass.

  5. List of nearest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_stars

    The known 131 objects are bound in 94 stellar systems. Of those, 103 are main sequence stars : 80 red dwarfs and 23 "typical" stars having greater mass. Additionally, astronomers have found 6 white dwarfs (stars that have exhausted all fusible hydrogen), 21 brown dwarfs, as well as 1 sub-brown dwarf, WISE 0855−0714 (possibly a rogue planet ).

  6. List of star extremes - Wikipedia

    en.wikipedia.org/wiki/List_of_star_extremes

    A star is a massive luminous spheroid astronomical object made of plasma that is held together by its own gravity.Stars exhibit great diversity in their properties (such as mass, volume, velocity, stage in stellar evolution, and distance from Earth) and some of the outliers are so disproportionate in comparison with the general population that they are considered extreme.

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  8. Stellar population - Wikipedia

    en.wikipedia.org/wiki/Stellar_population

    Many theoretical stellar models show that most high-mass population III stars rapidly exhausted their fuel and likely exploded in extremely energetic pair-instability supernovae. Those explosions would have thoroughly dispersed their material, ejecting metals into the interstellar medium (ISM), to be incorporated into the later generations of ...

  9. Binary star - Wikipedia

    en.wikipedia.org/wiki/Binary_star

    In the case where the binary is also a spectroscopic binary and the parallax of the system is known, the binary is quite valuable for stellar analysis. Algol, a triple star system in the constellation Perseus, contains the best-known example of an eclipsing binary. This video shows an artist's impression of an eclipsing binary star system.