It’s the third time since 2015 that such a collision has been observed via an instrument called LIGO (Laser Interferometer Gravitational-wave Observatory), which consists of a pair of detectors, one in Hanford, Washington, USA, and the other in Livingston, Louisiana, each designed to measure gravitational waves from distant cosmological events.
Gravitational waves are ripples in the fabric of space, created by movements of massive objects.
“Normally we don’t think of space as having any properties at all, so it’s counterintuitive,” says Michael Landry, director of LIGO’s Hanford.
- I want to know what is the antecedent of the pronoun It? “It is counterintuitive”.