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#science
#space
#universe
#cosmology
#astronomy
#astrophysics
#galaxies
#space pictures
#supernova
#xrays
#xray light
#canis major
#constellation
#neutron star
#black hole
#ngc 2207
#ic 2163
#chandra xray observatory
#spiral galaxies
#colliding galaxies
#dem wavelengths
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