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Affichage des articles dont le libellé est ASTRONOMY - Millions of Stars in Omega Centauri. Afficher tous les articles
Affichage des articles dont le libellé est ASTRONOMY - Millions of Stars in Omega Centauri. Afficher tous les articles

28/03/2024

ASTRONOMY - Millions of Stars in Omega Centauri

 2024 March 28

See Explanation.  Clicking on the picture will download
 the highest resolution version available.

Millions of Stars in Omega Centauri
Image Credit & Copyright: Massimo Di Fusco and Mirco Turra

Explanation: Globular star cluster Omega Centauri, also known as NGC 5139, is 15,000 light-years away. The cluster is packed with about 10 million stars much older than the Sun within a volume about 150 light-years in diameter. It's the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy. Though most star clusters consist of stars with the same age and composition, the enigmatic Omega Cen exhibits the presence of different stellar populations with a spread of ages and chemical abundances. In fact, Omega Cen may be the remnant core of a small galaxy merging with the Milky Way. With a yellowish hue, Omega Centauri's red giant stars are easy to pick out in this sharp, color telescopic view.

03/06/2021

ASTRONOMY - Millions of Stars in Omega Centauri

 2021 June 3

See Explanation.  Clicking on the picture will download
the highest resolution version available.

Millions of Stars in Omega Centauri
Image Credit & Copyright: Ignacio Diaz Bobillo

Explanation: Globular star cluster Omega Centauri, also known as NGC 5139, is some 15,000 light-years away. The cluster is packed with about 10 million stars much older than the Sun within a volume about 150 light-years in diameter. It's the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy. Though most star clusters consist of stars with the same age and composition, the enigmatic Omega Cen exhibits the presence of different stellar populations with a spread of ages and chemical abundances. In fact, Omega Cen may be the remnant core of a small galaxy merging with the Milky Way. Omega Centauri's red giant stars (with a yellowish hue) are easy to pick out in this sharp, color telescopic view.

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