MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45) (Lacheheb)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 19 Tau) · 25 Tau) · Barnard's Merope Nebula · IC 349 · Maia Nebula · Merope Nebula · NGC 1432 · NGC 1435 · Sterope I (21 Tau) · The star 18 Tau · The star Alcyone (η Tau · The star Asterope · The star Atlas (27 Tau) · The star Celaeno (16 Tau) · The star Electra (17 Tau) · The star Merope (23 Tau) · The star Pleione (28 Tau) · The star Sterope II (22 Tau) · The star Taygeta (q Tau

MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45), Lacheheb

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MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45)

Link: https://1drv.ms/i/s!ApfteboMEzL6v2YXp_TuUYl1XqZx?e=YUvkwY

Link to TIFF/FITS: https://1drv.ms/i/s!ApfteboMEzL6v2Vt0_PCIKboEq4N?e=2fKBUz

Powered byPixInsight

MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45)

Link: https://1drv.ms/i/s!ApfteboMEzL6v2YXp_TuUYl1XqZx?e=YUvkwY

Link to TIFF/FITS: https://1drv.ms/i/s!ApfteboMEzL6v2Vt0_PCIKboEq4N?e=2fKBUz

Les Pléiades, ou amas M45, sont un amas ouvert d'étoiles qui s'observe depuis les deux hémisphères, dans la constellation du Taureau.
L'exactitude de la distance de l'amas à la Terre est incertain. Cette distance, selon les différents instruments techniques utilisés, est estimée à environ 444 années-lumière.
L'origine du nom « Pléiades » provient de la mythologie grecque : les Pléiades sont sept sœurs, filles d'Atlas et de Pléioné : Astérope, Mérope (ou Dryope, ou Aéro), Électre, Maïa, Taygète, Célaéno (ou Sélène) et Alcyone.
On dénombre aujourd'hui dans cet amas environ 3 000 étoiles, dont une douzaine sont visibles à l'œil nu. Il s'étend sur 2°, soit l'équivalent de quatre fois le diamètre apparent de la Lune. Sa densité est donc relativement faible par rapport aux autres amas ouverts. L'âge de l'amas est estimé à 100 millions d'années, mais il ne devrait pas vivre longtemps puisqu'il devrait se séparer dans 250 millions d'années, en partie à cause de sa faible densité (il s'agit ici de la vie de l'amas et non de celle des étoiles qui le composent).
Les 9 étoiles les plus brillantes de l'amas tirent leur nom des 7 sœurs et de leurs parents. Leur magnitude apparente est comprise entre 2,86 et 5,44, donc accessible à l'œil nu. Astérope a la particularité d'être une étoile double.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

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Astrometry.net job	8478433
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MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45)

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MESSIER 45 ou amas ouvert des PLEÏADES (Nouveau traitement de Messier 45)

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