BALTIMORE, Aug. 16 (UPI) -- U.S. astronomers using NASA's Hubble Space Telescope say they've have caught two clusters of massive stars that may be in the early stages of merging.
What was first thought to be one cluster in the core of the massive star-forming region 30 Doradus, also known as the Tarantula Nebula, has been found to be a composite of two clusters that differ in age by about 1 million years, a NASA release reported Thursday.