Saturday, August 10, 2019
Choose a PROFESSIONAL TELESCOPE here on earth, or in space around the Essay
Choose a PROFESSIONAL TELESCOPE here on earth, or in space around the Earth, with which to observe Charles Messier's Butterfly Cluster - Essay Example ââ¬Å"Most of the bright stars in this cluster are hot, blue B type stars but the brightest member is a K type orange giant star, BM Scorpii, which contrasts sharply with its blue neighbors in photographs. BM Scorpii is classed as a semi regular variable star, its brightness varying from magnitude +5.5 to magnitude +7.0.Estimates of the Butterfly Clusters distance have varied over the years, with a mean value of around 1,600 light years, giving it a spatial dimension of some 12 light years. Modern measurements show its total visual brightness to be magnitude 4.2â⬠(www.answers.com....) Butterfly Cluster is ââ¬Å"an open cluster in Scorpius 4à ° northwest of M7 which contains about 80 stars roughly in the shape of a butterfly. Visible to the naked eye, it was first noted by Giovanni Hodierna before 1654. Its most conspicuous star is an orange giant K star of magnitude 6.2.â⬠(daviddarling infoâ⬠¦.) California Association for Research in Astronomy, own and operate the Keck Telescopes. It is an association of the California Institute of Technology and the University of California. I conducted my observations from the Keck Telescope in this institute. My choice was for this
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