About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 30. Chapters: Vega, Lyra, Ring Nebula, Vega as an X-ray source, List of stars in Lyra, Lyra XR-1, Kepler-8b, TrES-1b, Kepler-9, Kepler-9b, Kepler-9c, Kepler-9d, Epsilon Lyrae, Kepler-7, NGC 6791, Kepler-7b, GJ 758, HD 176051, Beta Lyrae, GSC 02652-01324, RR Lyrae, HD 177830, WASP-3b, HD 173416, NGC 6745, GJ 758 B, HAT-P-5, Messier 56, Gliese 747AB, HD 178911, Delta Lyrae, Delta Lyrae, GJ 758 C, HD 171301, HD 173416 b, HAT-P-5b, 17 Lyrae, HD 172044, HD 178911 Bb, HD 171384, Theta Lyrae, DM Lyrae, HD 175740, Iota Lyrae, HD 174179, Gamma Lyrae, Kappa Lyrae, HD 176871, HD 173936, IC 1296, HD 173417, HD 180450, HD 173780, HD 177809, 16 Lyrae, HD 167965, HD 176527, HD 177808, Lambda Lyrae, HD 178233, HD 175443, HD 171872, HD 171619, HD 172149, Mu Lyrae, HR Lyrae. Excerpt: Vega ( Lyr, Lyrae, Alpha Lyrae) is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus. It is a relatively close star at only 25 light-years from Earth, and, together with Arcturus and Sirius, one of the most luminous stars in the Sun's neighborhood. Vega has been extensively studied by astronomers, leading it to be termed "arguably the next most important star in the sky after the Sun." Vega was the northern pole star around 12,000 BC and will be so again around AD 13,727 when the declination will be +86 14'. Vega was the first star other than the Sun to be photographed and the first to have its spectrum recorded. It was one of the first stars whose distance was estimated through parallax measurements. Vega has served as the baseline for calibrating the photometric brightness scale, and was one of the stars used to define the mean values for the UBV photometric system. Vega is only about a tenth of the age of the Sun, but since it is 2.1 times a...