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giant star |
Also found in: Wikipedia, Hutchinson | 0.13 sec. |
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giant star: see red giant red giant, star that is relatively cool but very luminous because of its great size. All normal stars are expected to pass eventually through a red-giant phase as a consequence of stellar evolution . ..... Click the link for more information. . giant starStar with a relatively large radius for its mass and temperature; this yields a large radiating area, so such stars are bright. Subclasses include supergiant stars, red giants (with low temperatures, but very bright), and subgiants (with slightly reduced radii and brightness). Some giants are hundreds of thousands of times brighter than the Sun. Giants and supergiants may have masses 10–30 times that of the Sun and volumes millions of times greater and are thus low-density stars. |
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| Rodrigo Ibata of the Max Planck Institute for Astronomy in Heidelberg, Germany, and his colleagues describe their own large-scale survey of middle-aged stars known as carbon giant stars (http://xxx. You might call magnetars leftovers of giant stars," says Umran Inan, an engineering professor at Stanford University in Palo Alto, California, who studied the magnetar's blast. Normally, a white dwarf packs the equivalent of the sun's mass into a ball roughly the size of a modest planet, while neutron stars -- the crushed relics of supernova explosions of giant stars -- can have similar masses but diameters of 40 kilometers or less. |
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