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Astronomers Agog Over Black Hole's Strange Activity

Scientists Detect Gravitational Waves, Proving Einstein Right Scientists say they heard the faint chirp of two black holes colliding a billion light-years away, fulfilling Einstein’s general theory of relativity.

The Eridanus Void. This area shows almost no signs of cosmic matter, meaning no stars, planets, solar systems or clouds of cosmic dust. Researchers couldn't even find dark matter, which is invisible but measurable by its gravitational pull. There were also no signs of black holes that might have gobbled up the matter once present in the region.