... Astronomers divide stars into different spectral types. ... The Stars of NGC 300 . ... Like grains of sand on a cosmic beach, individual stars of large spiral galaxy NGC 300 are resolved in this sharp image from the Hubble Space Telescope's Advanced Camera for Surveys (ACS). ... Deep in the normally hidden recesses of giant molecular cloud DR21, a stellar nursery has been found creating some of the most massive stars yet recorded. ... Why would a cloud appear to be different colors? ...