A strange gravitational wave burst has been caught hitting Earth and it comes from somewhere near the red supergiant Betelgeuse. The ripple in the fabric of spacetime was detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the USA. Astronomers are not sure what caused the wave or whether it is a natural gravitational wave at all due to its unique nature. So far waves discovered by LIGO have all been connected to notable events such as two black holes colliding or neutron stars merging, but this is ‘a unique type of wave’.
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