Answer: Black hole
Notes: A team of astronomers using the Chile-based La Silla Observatory of the European Southern Observatory (ESO) has recently discovered the nearest black hole from Earth. This triple-structure black hole named as HR 6819, is located just 1000 light-years from Earth. Unlike the other black holes that have been detected till date, HR 6819 does not actively interfere with their surroundings. The team was able to distinguish its existence and measure its mass.
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