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L'indien – Le MICROSCOPE

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L'indien – Le MICROSCOPE L’Indien – Le Microscope Ces constellations ne contiennent pas d'objet céleste observable avec un équipement amateur. Hémisphère Sud Le CAPRICORNE Gamma Galaxie 4,67 N 6925 L’INDIEN – Le MICROSCOPE Alpha 4,87 Le SAGITTAIRE Le POISSON AUSTRAL Lacaille 8760 6,67 Distance 12,9 a.l. 3 Alpha La GRUE 3,11 Galaxie N 8760 Galaxie Galaxie N 7041 Le TELESCOPE N 7049 Galaxie IC 5152 Galaxie Βeta 3,67 Le TOUCAN N7090 Delta Galaxie 4,4 Galaxie N7141 superamas de galaxies du Paon-Indien 200 millions a.l. Epsilon 11,82 années-lumière Le PAON L’OCTANT constellations de l'hémisphère Sud. introduite par Nicolas-Louis de Lacaille en 1752 Les distances qui nous séparent des étoiles Les distances qui nous séparent des Galaxies Le superamas Paon-Indien, aussi appelé superamas du Paon, est un superamas de galaxies voisin du superamas local (qui contient la Voie lactée). Ce superamas est située entre 210 et 260 millions d'années- lumière (entre 64 et 78 mégaparsecs). Il contient trois principaux amas : Abell 3656, Abell 3698, le plus dense, et Abell 3742. Il fait partie d'un mur de galaxies assez proche qui relie l'amas de la Règle au superamas du Centaure. Une publication de 2014 émet l'hypothèse que ce superamas serait juste un lobe de Laniakea, un superamas plus grand centré sur le Grand Attracteur qui contient également le superamas de la Vierge dont nous faisons partie. 465 Millions a.l. Abell S0740 L'Indien, ou Oiseau indien[réf. nécessaire], est une constellation de l'hémisphère sud. La région qu'elle couvre, proche du pôle sud céleste, est relativement pauvre en étoiles et peu sont visibles à l'œil nu. L'acception « Oiseau indien » est relativement peu fréquente, en raison des risques de confusion avec la constellation de l'Oiseau de paradis. L'Indien est une constellation vraisemblablement inventée par les navigateurs néerlandais Pieter Dirkszoon Keyser et Frederick de Houtman à la fin du XVIe siècle et introduite par Johann Bayer dans son Uranometria en 1603. Elle est supposée représenter un Indien d'Amérique, que Bayer voulait honorer d'une place sur la voûte céleste. L'astronome Julius Schiller combina l'Indien et le Paon afin de former une constellation qu'il nomma d'après le personnage biblique Job. Cette constellation — comme toutes les autres créations religieuses de Schiller — ne rencontra pas de succès sur le long terme. La plus brillante, α Indi, de magnitude apparente 3,11, est une étoile géante de classe K0. Située à 100 années-lumière du système solaire, une dizaine de fois plus grande que le Soleil, son spectre montre qu'elle est anormalement enrichie en métaux. C'est également une étoile triple, ses compagnons, vraisemblablement des naines rouges, ne dépassant la magnitude 12. ε Indi est la 19e étoile la plus proche du Soleil, à 11,82 années-lumière de nous. δ Indi et θ Indi sont des étoiles doubles. On y trouve cependant la galaxie naine elliptique IC 5152, distante de 2 millions d'années lumière et appartenant à notre Groupe local, ainsi qu'une partie du superamas de galaxies du Paon-Indien, situé à plus de 200 millions d'années lumière. Quelques autres galaxies notables sont NGC 7090 (galaxie spirale) et NGC 7049 (galaxie elliptique). Indien (constellation). (2019, mars 19). Wikipédia, l'encyclopédie libre. Page consultée le 16:05, mars 19, 2019 à partir de http://fr.wikipedia.org/w/index.php?title=Indien_(constellation)&oldid=157687005. Microscope (constellation). (2018, août 2). Wikipédia, l'encyclopédie libre. Page consultée le 16:35, août 2, 2018 à partir de http://fr.wikipedia.org/w/index.php?title=Microscope_(constellation)&oldid=150921369. La constellation de l'Indien ne contient pas d'objet céleste observable avec un équipement amateur. .
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