Image: Hubble's standout stars bound together by gravity

This image from the NASA/ESA Hubble Space Telescope reveals a glistening and ancient globular cluster named NGC 3201—a gathering of hundreds of thousands of stars bound together by gravity. NGC 3201 was discovered in 1826 ...

North, east, south, west: The many faces of Abell 1758

Resembling a swarm of flickering fireflies, this beautiful galaxy cluster glows intensely in the dark cosmos, accompanied by the myriad bright lights of foreground stars and swirling spiral galaxies. A1758N is a sub-cluster ...

Hubble weighs in on mass of three million billion suns

In 2014, astronomers using the NASA/ESA Hubble Space Telescope found that this enormous galaxy cluster contains the mass of a staggering three million billion suns—so it's little wonder that it has earned the nickname of ...

Is the cosmic colossus RCS2J2327 heavier than allowed?

An international team of scientists led by researchers from the Argelander Institute for Astronomy has mapped the mass distribution in a distant galaxy cluster (RCS2J2327). This cosmic colossus is located in the constellation ...

Multiwavelength image of the 'Toothbrush' galaxy cluster

Most galaxies lie in clusters containing from a few to thousands of objects. Our Milky Way, for example, belongs to a cluster of about fifty galaxies called the Local Group whose other large member is the Andromeda galaxy ...

Image: Hubble's cosmic fireflies

Galaxies glow like fireflies in this spectacular NASA/ESA Hubble Space Telescope image. This flickering swarm of cosmic fireflies is a rich cluster of galaxies called Abell 2163.

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