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The Dubhe Star

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The Dubhe Star is located on the upper right of the dipper on the Ursa Major. It is around 4 times bigger than that of the sun, and that about equal to 16 times the diameter. It has a temperature of 4500 Kelvins. The Luminosity Of Dubhe is 100, which is 100 times bright than that of the sun. It is classified in the K spectral Class.

Here is the story of the Big Dipper.The "handle" of the dipper represents the "tail" of the bear on ancient star maps--even though modern bears don't have long tails! A Greek story (the Big Bear was so-called before Homer) explains that Zeus fell in love with a mortal woman named Callisto, who was a far-traveler and a huntress. His wife Hera became jealous, and changed Callisto into a large bear. When Callisto failed to return after a long journey, her son Arcas set out to find her, and in a forest one day met a huge bear. To his horror, the bear started to run toward him. Not perceiving it was his mother, Arcas fitted an arrow to his bow and was about to slay the bear, when Zeus, to avert the impending tragedy, changed Arcas into a smaller bear (he could not undo the spell of Hera). Then Zeus grabbed both bears by the tails, swung them around (thus stretching their tails out), and hurled them into the sky where they would be safe and immortal. However, Hera had the last word, moving them to the portion of the sky that never sets, so that until the end of the world Callisto and Arcas must endure weariness without rest.

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