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physical object > natural object > celestial body > star > circumpolar star |
circumpolar star comparison table |
Subject | is a kind of | has definition |
---|---|---|
star | celestial body | A celestial object that generates energy by means of nuclear fusion at its core. To do this it must have more than about 0.08 the sun's mass. If, for instance, the planet Jupiter were some fifty to one hundred times more massive than it is, fusion reactions would transpire in its core and it would be a star. See planet. |
circumpolar star | star | Star which never sets, from the viewpoint of an observer on Earth. |
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