The triple system, called HR 6819, is perhaps three times closer than the previous closest-known black hole.
The team that observed the black hole works under the Event Horizon Telescope project, an international collaboration that tries to directly observe the immediate environment of a black hole using a global network of Earth-based telescopes.
Some 65 million light-years from Earth, NGC1052-DF2 – "DF2" for short – is about the same size as our Milky Way, but has 100 to 1,000 times fewer stars.
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