Pleiades

Star cluster in the constellation of Taurus

The Pleiades ( PLEE-ə-deez, PLAY-, PLY-), also known as Seven Sisters and Messier 45 (M45), is an asterism of an open star cluster containing young B-type stars in the northwest of the constellation Taurus. At a distance of about 444 light-years, it is among the star clusters nearest to Earth and is the Messier object nearest to Earth, being the star cluster most obvious to the naked eye in the night sky. It contains over 1,000 stars, with the brightest six or seven being easily visible to the naked eye.

From Wikipedia, under CC BY-SA. More on occurri.