Main Sequence Definition
(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.
The area on the Hertzsprung-Russell diagram in which the main sequence is located.
(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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