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According to a new study from the NANOGrav Physics Frontiers Centre of the National Science Foundation, it's the strange, spacetime-warping effect of gravitational waves passing through galaxy.
You can't see or feel it, but everything around you — including your own body — is slowly shrinking and expanding. It's the weird, spacetime-warping effect of gravitational waves passing through our galaxy, according to a new study by a team of researchers with the U.S. National Science Foundation's NANOGrav Physics Frontiers Center. The results are the first evidence of the gravitational wave background — a sort of soup of spacetime distortions pervading the entire universe and long predicted to exist by scientists.
Astrophysicists have found the best evidence yet for a low-frequency “hum” of gravitational waves rippling through the cosmos, based on 15 years’ worth of ultra-precise measurements checking the timing of radio pulses from distant stars. The evidence, newly published in the Astrophysical Journal Letters, comes from several teams of researchers working in the U.S. and Canada as well as Europe, India, Australia and China. The teams monitored radio emissions from a total of 115 ultra-dense, spinnin