About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 199. Not illustrated. Chapters: Ara, Mu Arae, List of Stars in Ara, Westerlund 1, Alpha Arae, Mu Arae C, Hd 150136, Ngc 6193, Mu Arae B, 41 Arae, Gamma Arae, Hd 154857, Iota Arae, Nu Arae, Hd 157661, Stingray Nebula, Epsilon Arae, Hd 157662, Delta Arae, Ngc 6397, Eta Arae, Mu Arae D, Kappa Arae, Cxo J164710.2-455216, Hd 157753, Gliese 674, Hd 153053, Hd 153791, Hd 157819, Hd 152082, Hd 158476, Hd 156091, Hd 150576, Mu Arae E, Hd 156768, Lambda Arae, Zeta Arae, Hd 153201, Hd 154672 B, R Arae, Hd 152478, Hd 149837, Hd 153370, Hd 153261, Hd 165493, Hd 154857 C, Gliese 674 B, Hd 156331, Hd 153221, Hd 154857 B, Hd 156411, Hd 158220, Gliese 676, Hd 155341, Nu Arae, Gliese 676 Ab, Hd 149989, Theta Arae, Hd 151566, Hd 155035, Beta Arae, Hd 156411 B, Hd 152079, Hd 151967, Hd 160342, Epsilon Arae, S Arae, Ngc 6263, Hd 152079 B, Z Arae, Pi Arae, Sigma Arae, Ngc 6208, Ngc 6167, Ngc 6250, Ngc 6200, Ngc 6204, Water Lily Nebula, Nu Arae, Epsilon Arae. Excerpt: Mu Arae ( Ara / Arae), often referred to by its designation in the Henry Draper catalogue HD 160691, is a main sequence G-type star approximately 50 light-years away from Earth in the constellation of Ara. The star has a planetary system with four known planets, three of them with masses comparable to that of Jupiter. The system's innermost planet was the first "Hot Neptune or super-earth" to be discovered. According to measurements made by the Hipparcos astrometric satellite, Mu Arae exhibits a parallax of 64.47 milliarcseconds as the Earth moves around the Sun. When combined with the known distance from the Earth to the Sun, this means the star is located at a distance of 50.6 light years (15.51 parsecs). Seen from Earth it has an apparent magnitude of +5.12 and is visible to the naked eye. Asteroseismic analysis of the star reveals it is approximately 10% more massive than the Sun ...