The wonders of nothingness.

aka Black Holes.

GW190521 (or GW190521g; initially, S190521g)^[5] is a gravitational wave signal resulting from the merger of two black holes near a third supermassive black hole, which was associated with a coincident and uncharacteristic flash of light.^[2][6] The event was observed by the LIGO and Virgo detectors on 21 May 2019 at 03:02:29 UTC,^[7] and later confirmed in studies published on 2 September 2020.^[4][5][8] The event was located 17 billion light years away,^{[n 1][5][9]} in location area 765^[10] deg^{2[n 2][11][12]} towards Coma Berenices, Canes Venatici, or Phoenix.^{[1][2][6][13]}

^{https://en.wikipedia.org/wiki/GW190521}