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population I |
Also found in: Wikipedia, Hutchinson | 0.01 sec. |
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population I [‚päp·yə′lā·shən ′wən] (astronomy) A class of stars which are relatively young, have relatively low peculiar velocities, and are found chiefly in the spiral arms of galaxies. Also known as arm population. 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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| The conventional wisdom is that high metallicity is required for extrasolar planets to be detected, and we now have a spectacular counterexample," notes theorist Alan P. Truran of the University of Illinois in Urbana-Champaign rates the progenitor's metallicity at about half that of the sun and says that may be "why we had not seen a Type II supernova in an irregular metal-deficient galaxy like the Large Magellanic Cloud. |
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