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| Name | Pleiades | The Seven Sisters |
| Video Uploader | Video From celeris |
| Upload Date | This Video Uploaded At 06-06-2020 06:14:54 |
| Video Discription | Pleiades is an open star cluster at a distance of about 130 parsecs. Lying in the Taurus constellation, it is one of the nearest star cluster visible to the naked eye. Pleiades has over 1000 stars and interstellar objects. The 9 brightest stars of Pleiades are as follows: Alcyone, Asterope / Sterope, Atlas, Calaeno, Electra, Maia, Merope, Pleione, Taygeta. A reflection nebula surrounds the cluster, that shines blue due to the light emitted by the hot blue luminous stars. The nebula is actually a relatively dense interstellar medium, not the left-over dust from the cluster formation, as that generally gets dispersed by 100 million years. The cluster core radius is about 8 light-years and tidal radius is about 43 light-years. Core radius is the distance at which the apparent surface luminosity of the cluster has dropped by half. Tidal radius is the distance at which the external gravitation of the galaxy has more influence over the stars in the cluster than does the cluster itself. The cluster is about 100 millions years old, and is expected to survive for another 250 millions years. After which it will get dispersed due to gravitational interactions with the galactic neighborhood. It is mainly dominated by middle-aged hot blue B-type stars and brown dwarfs, which have 8% of the sun’s mass, not heavy enough to trigger nuclear fusion. One of the stars - HD23514 - which has a mass and luminosity bit more than the sun’s, is surrounded by an extraordinary amount of hot dust and gas which could be a sign of exoplanet formation. The dust particles in the dark interstellar cloud near Merope slowly gets deaccelerated due to radiation pressure of Merope, as they move towards Merope at a relative speed of 11 km/s. __________________________________________ Graphics: Space Engine, NASA/ESA, ESO Music: Escape by Sappheiros "Escape by Sappheiros" is under a Creative Commons license (CC BY 3.0) Music promoted by BreakingCopyright: https://youtu.be/UMRL6ltNfPU __________________________________________ SUBSCRIBE Celeris [lIoRS8dS9dY] |
| Category | Science & Technology |
| Tags | the elegant cosmos | celeris | universe | cosmos | astronomy | nature | star cluster | pleiades | krittika | pleiades cluster | the seven sisters | pleiades overlord | pleiades seven sisters overlord | pleiades star cluster images | pleiades nasa supercomputer | m45 | messier 45 | messier objects | deep sky objects | deep sky objects through telescope | pleiades through telescope |
