Cosmic Heavy Metal

A heavy-metal homeThis 10.5-billion-year-old globular cluster known as NGC 6496 is home to heavy-metal stars. Many of the stars in this spherical cluster are enriched with much higher than usual proportions of metals—all the elements heavier than hydrogen and helium are known as metals in astronomy, even the one chemically classified as non-metal—than stars found in similar clusters.

Image Credit: NASA

Leave a Reply