... Star Cluster R136 Bursts Out . ... In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. ... Sombrero Galaxy Across the Spectrum . ... Their newly formed, bright, blue star clusters along beautiful, symmetric spiral arms are guaranteed to attract attention. ... Astronomical images of the well-known Pleiades often show the star cluster's alluring blue reflection nebulae, but they are washed-out here in the clouds and bright moonlight. ...