Title : Gliese 876 - Video Learning - WizScience.com Duration : 02:15 Posted : 06 May 2016 - 19:05
Gliese 876 - Video Learning - WizScience.com
"Gliese 876" is a red dwarf approximately 15 light-years away from Earth in the constellation of Aquarius. It is the third closest known star to the Sun confirmed to possess a planetary system and the closest such system known to consist of multiple planets. As of 2011, four extrasolar planets have been found to orbit the star. The planetary system is also notable for the orbital properties of its planets. It is the only known system of orbital companions to exhibit a triple conjunction in the rare phenomenon of Laplace resonance . It is also the first extrasolar system around a normal star with measured coplanarity. Two of the middle planets are located in the system's habitable zone, however they are giant planets believed to be analogous to Jupiter. Gliese 876 is located fairly close to the Solar System. According to astrometric measurements made by the Hipparcos satellite, the star shows a parallax of 213.28 milliarcseconds, which corresponds to a distance of 4.69 pc, currently making it the third closest known star with orbiting planets, after Epsilon Eridani and Gliese 674. Despite being located so close to Earth, the star is so faint that it is invisible to the naked eye and can only be seen using a telescope. As a red dwarf, Gliese 876 is much less massive than the Sun: estimates suggest it has only 32% of the mass of the Sun. The surface temperature of Gliese 876 is cooler than the Sun and the star has a smaller radius. These factors combine to make the star only 1.24% as luminous as the Sun, and most of this is at infrared wavelengths. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Gliese+876, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
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