Giant star | Wikipedia audio article
Channel: wikipedia tts
Date: 17/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Giant_star


00:01:15 1 Formation
00:01:45 1.1 Intermediate-mass stars
00:06:29 1.2 High-mass stars
00:09:10 1.3 Low-mass stars
00:10:32 2 Subclasses
00:10:54 2.1 Subgiants
00:11:45 2.2 Bright giants
00:12:44 2.3 Red giants
00:14:45 2.4 Yellow giants
00:17:31 2.5 Blue (and sometimes white) giants



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SUMMARY
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A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III.  The terms giant and dwarf were coined for stars of quite different luminosity despite similar temperature or spectral type by Ejnar Hertzsprung about 1905.Giant stars have radii up to a few hundred times the Sun and luminosities between 10 and a few thousand times that of the Sun. Stars still more luminous than giants are referred to as supergiants and hypergiants.
A hot, luminous main-sequence star may also be referred to as a giant, but any main-sequence star is properly called a dwarf no matter how large and luminous it is.