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How to make a massive star cluster: Start with a lot of gas. A *lot*.

5 May 2020, 13:00 UTC
How to make a massive star cluster: Start with a lot of gas. A *lot*. ESA/Hubble & NASA, F. Ferraro et al.

Globular clusters are one of my favorite kind celestial objects. These are roughly spherical stellar cities, some with hundreds of thousands of stars in them (and a few topping a million). About 160 of them are known to orbit the Milky Way galaxy, and through an eyepiece the nearer ones are staggeringly beautiful, like a buzzing beehive of jewel-like stars.

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