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Westerlund 1, multiwavelength A composite image of the star cluster Westerlund 1, using X-ray data from NASA's Chandra observatory, infrared data from the NASA/ESA/CSA James Webb Space Telescope, and optical data from the NASA/ESA Hubble Space Telescope. X-ray: NASA / CXC / SAO; Optical: NASA / ESA / STScI; IR: NASA / ESA / CSA / STScI; Processing: NASA / CXC / SAO / L. Frattare