ultra-dense neutron star
Original Published Date: 
Friday, May 31, 2019

Full article issued by the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav).

ARC Future Fellow and Associate Investigator at the ARC Centre of Excellence for Gravitational Wave Discovery, Dr Adam Deller, has helped test Einstein’s theory of general relativity and shown it still can’t be proven wrong, using the complicated orbital dance of three compact stars. Einstein’s strong equivalence principle says all objects should fall the same way in a gravitational field, regardless of their composition or how dense they are.

The triple stellar system was discovered in 2012 and was determined to be the perfect system to test the theory due to the substantial differences in the make-up of the three stars. After five years of intensive observation, the international team of nine astronomers was able to conclude that the theory of general relativity is still relevant. General relativity underpins many calculations that are essential in finely calibrating the movements of satellites and space probes, and in understanding the evolution of the universe.

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