Hot, Young Stars
Westerlund 2, a young star cluster with an estimated age of about one or two million years, is the subject of study in this Chandra X-ray Observatory image. Westerlund 2 has become regarded as one of the most interesting star clusters in the Milky Way galaxy. It contains some of the hottest, brightest and most massive stars known.
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https://www.nasa.gov/image-detail/hot-young-stars/
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