Star Cluster R136 Bursts Out . ... Credit Copyright: NASA , ESA , F. Paresce ( INAF-IASF ), R. O'Connell ( U. Virginia ), the HST WFC3 Science Oversight Committee Explanation: In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. ... Gas and dust clouds in 30 Doradus , also known as the Tarantula Nebula, have been sculpted into elongated shapes by powerful winds and ultraviolet radiation from these hot cluster stars. ...