About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 179. Not illustrated. Chapters: Gliese 436, Hd 189733, Corot-7, Corot-1, Gsc 03549-02811, Hd 209458, Struve 1341, Hd 149026, Gj 1214, Hd 17156, Ogle-Tr-111, Ogle-Tr-113, Xo-1, Gsc 02620-00648, Wasp-2, Wasp-16, Ads 16402, Ogle-Tr-56, Ogle-Tr-10, Gsc 03089-00929, Corot-4, Corot-2, Lupus-Tr-3, Hd 147506, Gsc 02652-01324, Hat-P-11, Wasp-11/hat-P-10, Ogle-Tr-132, Xo-2, Hat-P-9, Wasp-6, Xo-5, Ogle-Tr-182, Ogle-Tr-211, Hat-P-3, Corot-3, Ogle2-Tr-L9, Wasp-7, Hat-P-7, Hat-P-12, Hat-P-4, Corot-6, Xo-3, Hat-P-5, Xo-4, Hat-P-8, Corot-5, Wasp-19, Wasp-18, Wasp-8. Excerpt: Gliese 436 - Stellar models for this star give an estimated size of about 42% of the Sun's radius. The same model predicts a surface temperature of about 3318 K. Gl 436 is older than the Sun by several billion years but it only has an abundance of heavy elements (with masses greater than helium-4) equal to 44% of the Sun's. The projected rotation velocity is less than 3 km/s, and the chromosphere has only a low level of magnetic activity. This star is a member of the "old-disk population" with velocities in the galactic coordinate system of U=+44, V=20 and W=+20 km/s. The star is orbited by one known planet, designated Gliese 436 b. The planet has an orbital period of 2.6 Earth Days and transits the star as viewed from Earth. It has a mass of 22.2 times Earth's Mass and is roughly 55,000 km in diameter, giving it a mass and radius similar to the ice giant planets Uranus and Neptune in our solar system. In general, Doppler spectroscopy measurements do not measure the true mass of the planet, but instead measure the product m sin i, where m is the true mass and i is the inclination of the orbit (the angle between the line-of-sight and the normal to the planet's orbital plane), a quantity that is generally unknown. However, for Gliese 436 b, the transits enable the determinati...
