Armagh Astronomers hunting for Cosmic Explosions – Astronotes
Armagh is a partner in two telescope projects whose key goal is to detect the optical counterpart of colliding massive dead stars. Albert Einstein predicted that when two massive objects spiral around each other, eventually merging to become one more massive object, gravitational waves would be emitted. Scientists spent a century building detectors to measure the effect of gravitational waves from these mergers sweeping past the Earth. In 2015 the two LIGO (Laser Interferometer Gravitational-wave Observatory) instruments in the USA were able to detect the signal from two merging blackholes, followed two years later by two merging neutron stars. Because of the way these detectors work, it’s not currently possible to pin-point precisely where in the sky the event took place. If we can pinpoi...