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 â€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 4.2† (www.answers.com....) Butterfly Cluster is â€Å"an open cluster in Scorpius 4 ° 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.† (daviddarling info†¦.) 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