Modern astronomers now recognize an entire class of long period Mira-type variables as cool, pulsating, red giant stars, 700 or so times the diameter of the Sun.
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- 现代的天文学家知道这是一种刍藁型的长周期变星,它们是低温、脉动的红巨星,大小是太阳直径的700倍左右。