About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 36. Chapters: Betelgeuse, Rigel, Orion, List of stars in Orion, Orion-Eridanus Superbubble, Zeta Orionis, HD 38529, Pi Orionis, Delta Orionis, 25 Orionis, S Ori 70, Epsilon Orionis, Trapezium Cluster, HD 33636, Chi Orionis, Herbig-Bell catalog, Lambda Orion X-1, U Orionis, Orion's Belt, HD 36960, Gliese 179, Lambda Orionis, Theta Orionis C, HD 37605 b, Bellatrix, Tau Orionis, Chi Orionis, HD 290327, HD 34445, NGC 1999, Gliese 179 b, IC 2118, Iota Orionis, HD 38529 b, Sigma Orionis, Phi Orionis, Messier 78, Kappa Orionis, Gliese 208, HD 34445 b, HD 290327 b, Theta Orionis, Flame Nebula, FU Orionis, Gliese 204, NGC 2174, Ardra, Upsilon Orionis, Messier 43, NGC 2023, S Orionis, Gliese 223.2, NGC 1788, 4U 0614+091, Pi4 Orionis, GJ 3379, V380 Orionis, Pi Orionis, Orion's Sword, V1046 Orionis, NGC 2169, NGC 2175, HH 34, Collinder 69, 15 Orionis, Lynds 1616, Chi Orionis. Excerpt: Betelgeuse, also known by its Bayer designation Alpha Orionis ( Orionis, Ori), is the eighth brightest star in the night sky and second brightest star in the constellation of Orion, outshining its neighbour Rigel (Beta Orionis) only rarely. Distinctly reddish-tinted, it is a semiregular variable star whose apparent magnitude varies between 0.2 and 1.2, the widest range of any first magnitude star. The star marks the upper right vertex of the Winter Triangle and center of the Winter Hexagon. Classified as a red supergiant, Betelgeuse is one of the largest and most luminous stars known. If it were at the center of our Solar System, its surface would extend past the asteroid belt possibly to the orbit of Jupiter and beyond, wholly engulfing Mercury, Venus, Earth and Mars. However, with distance estimates in the last century that have ranged anywhere from 180 to 1,300 light years from Earth, calculating its diameter, luminosity and mass have proven difficul...
