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main-sequence star |
Also found in: Wikipedia, Hutchinson | 0.03 sec. |
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main-sequence star: see Hertzsprung-Russell diagram Hertzsprung-Russell diagram [for Ejnar Hertzsprung and H. N. Russell ], graph showing the luminosity of a star as a function of its surface temperature. The luminosity, or absolute magnitude , increases upwards on the vertical axis; the temperature (or some ..... Click the link for more information. . How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Either the star is so young that it hasn't finished contracting or so old--about 500 million years--that it has had time to expand its girth after becoming a main-sequence star. Over billions of years, enough of this material could accumulate in a main-sequence star to leave a core of strange matter when the star dies. For nearly a decade, Beta Pictoris has reigned as the only mature, main-sequence star with an encircling disk of dust - perhaps much like the disk from which our solar system evolved 4. |
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