main sequence ( synonym found)
Definition of main sequence:

(n) : 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
Definition of main sequence:

(n) : 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
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