Like an old friend returning after a long absence, the dazzling globular cluster Messier 13 in the constellation Hercules rises in the eastern sky a little earlier each night, a welcome sight along with the bright stars constellations of northern spring and summer.
M13 is one of the finest showpieces of the northern spring and summer skies. It’s located along one edge of the “Keystone” shape of Hercules (see image below). Just at the limit of human eyesight, M13 holds a million stars some 12-13 billion years old, nearly as old as the universe [Read more…] about Messier 13 Returns
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