Messier catalog

The core of the globular cluster M2 is packed with stars. Credit: ESA/Hubble & NASA, G. Piotto et al.
Hubble's view of the globular cluster M2: It's full of (weird) stars
Phil Plait

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Tag: Science
Tag: Bad Astronomy
Tag: Messier catalog
Hubble gets Messier
Phil Plait
Mar 21, 2018
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The core of M 4, at 5,000 light years away the closest globular cluster to Earth, making it a prime target for Hubble Space Telescope. Credit: ESA/Hubble & NASA
Tag: Science
Tag: Bad Astronomy
Tag: Messier catalog