Main-sequence meaning

A major grouping of stars that forms a relatively narrow band from the upper left to the lower right when plotted according to luminosity and surface temperature on the Hertzsprung-Russell diagram.
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Of or relating to a main sequence.
adjective
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Of or relating to a star in hydrostatic equilibrium that is fueled by hydrogen fusion reactions in its core.
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The continuous, generally diagonal line or band in the Hertzsprung-Russell diagram ranging from the upper left to the lower right and representing stars of average size whose luminosities correspond predictably to their surface temperatures. Stars in this grouping maintain a stable nuclear reaction and experience only small fluctuations in luminosity and temperature. Main-sequence stars are believed to be in the stable, middle phase of their development; they are expected to move off the main sequence once the hydrogen in their core is exhausted. At that point, depending on its size, a main-sequence star will become a giant star, a supergiant star, or a white dwarf. The more massive the star, the faster it burns its nuclear fuel and the shorter it remains in the main sequence.
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(astronomy): A major grouping of stars that creates a narrow band from the upper left to the lower right when plotted by luminosity and surface temperature on a Hertzsprung-Russell diagram.
pronoun
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The area on the Hertzsprung-Russell diagram in which the main sequence is located.
pronoun
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(astronomy) Of or dealing with a major group of stars forming a band stretching from upper left to lower right on a Hertzsprung-Russell diagram when being plotted by luminosity and surface temperature.
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