Messier 69

 Messier 69

Image credit: ESA, NASA

M69 is one of the most metal-rich globular clusters ever observed. In astronomy, the term “metal” refers to any element heavier than the two most common elements in our universe, hydrogen and helium. The nuclear fusion that powers stars created many of the metallic elements in nature, from the calcium in our bones to the carbon in diamonds. New stars are made from the remains of their predecessors, so ancient globular clusters have much lower metallic abundances than more recently formed stars, such as the sun.

The stars in M69 have over ten times more iron than stars in other globular clusters of the same age. Studying the makeup of stars in globular clusters like M69 has helped astronomers trace back the evolution of star formation in the cosmos.

This cluster was discovered by Charles Messier in 1780. It is located 29,700 light-years away from Earth in the constellation Sagittarius. M69 has an apparent magnitude of 8.3 and can be spotted with a pair of binoculars most easily in August. This Hubble image of M69’s center is a composite of exposures taken in visible and infrared light.

Distance away from Earth: 29,000 light-years

Constellation                     :Sagittarius

Apparent Magnitude         : 8.3

Naked Visibility                 : Can see through naked eyes

Spotted During                  : August Month

Image credit: Image courtesy of Sterrlium

Previous Object: Messier 68/\ Next Object: Messier 70

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