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NGC 6240


NGC 6240 is a peculiar, butterfly- or lobster-shaped galaxy consisting of two smaller merging galaxies. It lies in the constellation of Ophiuchus, the Serpent Holder, some 400 million light-years away. Observations with NASA s Chandra X-ray Observatory have disclosed two giant black holes, about 3,000 light-years apart, which will drift toward one another and eventually merge together into a larger black hole. The merging process, which began about 30 million years ago, triggered dramatic star formation and sparked numerous supernova explosions.



The merger will be complete in some tens to hundreds of millions of years.


Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble (STScI/AURA)

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