Glossary term: Amas de galaxies

Description: Un amas de galaxies est un ensemble de galaxies liées par la gravitation. Les amas de galaxies peuvent varier en taille et en concentration, contenant des centaines à des milliers de galaxies. L'amas de la Vierge, qui est l'amas de galaxies le plus proche, est un exemple de grand amas contenant des milliers de galaxies. Outre les galaxies, les amas contiennent également du plasma et de grandes quantités de matière noire.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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Loose grouping of galaxies with many yellow-ish elliptical galaxies and one priminent spiral galaxy

Fornax Galaxy Cluster

Caption: Galaxies can reside in groups, such as our own local group, or in clusters of galaxies. The Fornax Galaxy Cluster is one of the nearest such large groupings of galaxies. Visible in this image taken by the Very Large Telescope Survey Telescope VST (at the European Southern Observatory in Chile) are elliptical galaxies (without defined structures and in a yellow tint) but also spiral galaxies such as NGC 1365 towards the bottom right. This galaxy in particular is classified as a barred spiral galaxy due to its prominent and well-defined bar. The center of the Fornax Cluster is the giant elliptical galaxy NGC 1399, visible as the largest galaxy on the left of the image.
Credit: ESO. Acknowledgement: Aniello Grado and Luca Limatola credit link

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