Sunday, June 5, 2016

NASA IMAGE - Hubble Rocks with a Heavy-Metal Home

Hubble Rocks with a Heavy-Metal Home: This 10.5-billion-year-old globular cluster, NGC 6496, is home to heavy-metal stars of a celestial kind! The stars comprising this spectacular spherical cluster are enriched with much higher proportions of metals — elements heavier than hydrogen and helium are curiously known as metals in astronomy — than stars found in similar clusters.


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