A composite image comprised of optical data from the Isaac Newton Telescope and X-ray data from Chandra showing the stellar association Cygnus OB2(Credit: X-ray: NASA/CXC/SAO/J. Drake et al; H-alpha: Univ. of Hertfordshire/INT/IPHAS; Infrared: NASA/JPL-Caltech/Spitzer)
NASA marks Chandra space telescope’s 20th anniversary with gallery of stunning new images
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