Star clusters are among the most beautiful objects in the heavens, and the late summer sky features one of the finest of them all. Just to the south of the tail of Aquila, the Eagle, and in the tiny ...

In 1781, French astronomer Charles Messier published a catalog of 103 objects in the heavens. He was primarily interested in comets, but kept finding fuzzy smudges that did not move against the ...

The “Messier marathon” prompts space hobbyists to spot 110 celestial objects in one night, and the best time to try it is in March Carlyn Kranking - Associate Web Editor, Science The Whirlpool Galaxy ...

Jupiter’s moon Europa, which recently made headlines after NASA’s Juno spacecraft measured the amount of oxygen it produces, performs a disappearing act this evening as it slips behind and is occulted ...