51 Pegasi se trouve dans la constellation de Pégase, à environ 48 années-lumière de la Terre. This discovery provides additional information about the nature of the atmosphere of this exoplanet and indicates that the planetary system this star is a double with the observed spectral lines of both components. 51 Pegasi b est le nom de la première exoplanète (planète en dehors de notre système solaire) autour d’une étoile semblable au Soleil nommée 51 Pegasi dans la constellation de Pégase. 51 Pegasi (abbreviated 51 Peg), also named'Helvetios", is a G-type main-sequence star located 50.9 light years (15.61 parsecs) away from Earth, in the constellation Pegasus. It wis the first main-sequence starn foond tae hae an exoplanet (designatit 51 Pegasi b, offeecially named Dimidium, umwhile unoffeecially dubbed Bellerophon) orbitin it. Retrouvez Greetings From Your First Exoplanet - 51 Pegasi b: NASA Themed Astronomer Notes or Engineering Logbook: A Journal, Workbook for Engineers, Physics, Cosmology, Astronomy Students and Outer Space Nerds et des millions de livres … 51 Pegasi. 51 Pegasi (abbreviatid 51 Peg), an aw named Helvetios, is a Sun-lik starn locatit 50.9 light-years (15.6 parsecs) frae Yird in the constellation o Pegasus. Cette étoile naine jaune est considérée comme un jumeau du Soleil quoique qu'un peu plus vieille (7,5 milliards d'années), 4 à 6 % plus massive et avec une métallicité plus élevée. 51 Pegasi b Astronomers have discovered the presence of water molecules in the atmosphere surrounding the hot Jupiter 51 Pegasi b. Noté /5.

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