Friday, March 16, 2012

NASA Hubble image: Glittering Jewels of Messier 9

This image from the NASA/ESA Hubble Space Telescope shows the globular cluster Messier 9

Hubble’s image resolves stars right into the centre of the cluster, and clearly shows they have different colours. 

Redder colours signify lower surface temperatures, while blue stars are extremely hot.

Credit: NASA & ESA

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