14 extremely bright spots called “ultra-luminous X-ray sources” (ULXs) are seen here among the merger of two galaxies in Arp 299! All of those sources are likely black holes or neutron stars pulling material from a companion star! (Chandra) via /r/spaceporn https://ift.tt/2WKQS5i
via Tumblr https://ift.tt/32p9byo
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