Geography, 02.03.2020 16:29, michaellowe8434
It is believed that, at the center of our galaxy, is a "super-massive" black hole. One datum that leads to this conclusion is the important recent observation of stellar motion in the vicinity of the galactic center. If one such star moves in an elliptical orbit with a period of 17.2 years and has a semi-major axis of 5.7 light-days (the distance light travels in 5.7 days), what is the mass around which the star moves in its Keplerian orbit
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The meseta in spain is a a. navigable river b. castle c. coastal plain d. plateau
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Which two nations are doing the most to combat their environmental issues?
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It is believed that, at the center of our galaxy, is a "super-massive" black hole. One datum that le...
History, 31.07.2019 14:30