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Monash Lens Einstein’s general theory of relativity predicts that enormous disturbances in space, such as the collisions of massive black holes or neutron stars, cause gravitational waves. Paul Lasky Lecturer, School of Physics & Astronomy “They’re ripples in spacetime that travel at the speed of light,” explains astrophysicist Paul Lasky. “If I move a really large mass around quickly, then just like when a duck swims along a pond, the water ripples out in a little tail at its back. Similar thing with gravity … and that’s the thing that we detect.” Gravitational waves were directly observed for the first time on 14 September, 2015, a century after Einstein published his theory. Two black holes merged – one was about 36 solar masses, and the other the size of about 29 suns – and when the ripples reached the Earth, they caused the two 4km-long arms of the two LIGO gravitational wave detectors in the US to record what might be the most subtle measurement ever, a

South australiaPaul laskyAustralian research centre of excellenceAustralian academy of sciencesSwinburne universityUniversity of melbourneNeutron star extreme matter observatoryAustralian research centreGravitational wave discoveryAstronomy decadal planAustralian academyWestern australiaதெற்கு ஆஸ்திரேலியாபால் சோம்பேறிஆஸ்திரேலிய ஆராய்ச்சி மையம் ஆஃப் சிறப்பானதுஆஸ்திரேலிய கலைக்கழகம் ஆஃப் அறிவியல்