Astronomers have discovered a new kind of star system: Elongated and clumpy clusters of young, hot, blue stars, formed out of gas blown out of a galaxy as it rams its way through a galaxy cluster.

A new 527-megapixel image captures two open star clusters, NGC 456 and NGC 460, orbiting our Milky Way galaxy. The image uses ...

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A brilliant blue star cluster shines brightly about 1,500 light-years from Earth in this new photo released by the European Southern Observatory.

Just like people, huge star clusters age at variable rates depending on their lifestyles, a new study reports. While such star clusters are many billions of years old, some of them manage to stay ...

This week's Hubble image is, appropriately enough, a star cluster called NGC 330 which glitters in shades of red, white, and blue.

Blue stragglers sink toward the center of a star cluster over time. (Image credit: ESA/Hubble/NASA/L. Calçada) These stragglers revealed something interesting about how star clusters evolve , the ...

However, in all open and globular star clusters, a few blue stragglers, stars higher-up on the main sequence than normal, can be found. Christopher Tout, Nature 478, 331–332 (2011) ...

As the cluster ages, the massive, blue stars run out of fuel first. When a star dies, it stops fusing hydrogen and begins fusing helium. Because this happens at a much higher temperature, the star ...

The study of blue stragglers has a long history. By imaging a star cluster and plotting the brightness versus colour for the individual stars, in what is known as a colour–magnitude diagram, one ...