Messier 7 (M7), also known as Ptolemy’s Cluster, is a bright open cluster in Scorpius constellation. The cluster lies at an approximate distance of 980 light years from Earth. It has the designation NGC 6475 in the New General Catalogue. With a visual magnitude of 3.3 and an apparent diameter of 80 arc minutes – more than twice the apparent size of the full Moon – Ptolemy’s Cluster is an easy naked-eye target.
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Messier 5 (M5) is a bright globular cluster located in the northern constellation Serpens. It lies at a distance of 24,500 light years from Earth, in the galactic halo of the Milky Way. It has the designation NGC 5904 in the New General Catalogue.
With an apparent magnitude of 6.65, Messier 5 can be seen without binoculars, but only under extremely dark skies and it only appears as a faint star near the star 5 Serpentis. Binoculars will reveal the object to not be a star, but a fuzzy patch of light, and small telescopes will show a bright glowing core.
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