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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 . As a star uses up its hydrogen by converting it to helium, its central core contracts while the... Read more |
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red algae
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Red Hats
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Red Brigades
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red dwarf
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red flag
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red clay
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red shift
red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect was discovered by V. M. Slipher of Lowell Observatory. Some red shifts are the result of... Read more |
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Red Deer (Canada)
Red Deer city (1991 pop. 58,134), S central Alta., Canada, on the Red Deer River. It developed as a trade and service center for a region of dairying and mixed farming. The discovery of oil and natural gas after World War II lead to the growth of Red Deer's petroleum service industry, as well as... Read more |
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Tropic birds
Phaethontidae (tropicbirds; class Aves, order Pelecaniformes) A family of medium-sized, mainly white sea-birds which have some black on the head and wings, and long, white or red central tail feathers. They have stout, yellow or red bills, and pale legs with black, totipalmate feet. They are highly... Read more |
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