Nasa’s Hubble captures a spectacular cluster of 500,000 ancient stars to mark America's 250th anniversary
Image: NASA What makes a globular cluster different from ordinary stars Why Messier 3 stands out even among other ancient clusters The unusually young looking
Image: NASA What makes a globular cluster different from ordinary stars Why Messier 3 stands out even among other ancient clusters The unusually young looking stars hiding among the ancient ones Evidence pointing to an ancient galactic merger Why the colours in the image carry real scientific meaning What this discovery adds to the bigger picture of Hubble's mission
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