Gravitational waves have been predicted by Albert Einstein's theory of general relativity. They are ripples in the fabric of space-time that are created when massive objects like stars or black holes interact with each other. The first direct detection of gravitational waves was announced in February 2016, when physicists detected waves produced by two black holes merging 1.3 billion light years away. Since then, researchers have detected several more gravitational wave events, including the merger of two neutron stars. The detection of gravitational waves has opened up a new way to observe the universe, and has provided insight into the nature of gravity and the behavior of some of the most extreme objects in the universe.
NANOGrav made the first detection of low-frequency gravitational waves this year. Now, the hunt is on to find the source of these ripples in space — and supermassive black holes are lead suspects.
Utilizing sophisticated simulation technology, researchers from UNIGE, Northwestern University, and the University of Florida have shed light on the enigmatic nature of these celestial "beasts." Black holes, among the universe's most mesmerizing phenomena, have a gravitational force so intense that