... WFPC2 , HST , NASA . Explanation: In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. Known as R136 , the cluster's energetic stars are breaking out of the cocoon of gas and dust from which they formed. ... Although the young ages of stars in R136 make it similar to a Milky Way open cluster, its high density of stars will likely turn it into a low mass globular cluster in a few billion years. ... Massive Stars Of 30 Doradus . ...