Scientists observe for the first time the faint ripples caused by the motion of black holes that are gently stretching and squeezing everything in the universe.
The Very Large Array radio telescope in New Mexico. This and several other telescopes around the world were used to observe the slow gravitational waves — faint ripples made by massive black holes — that are constantly stretching and squeezing everything in the universe ever so slightly.NEW YORK — Scientists have observed for the first time the faint ripples caused by the motion of black holes that are gently stretching and squeezing everything in the universe.
Those quick “chirps” come from specific moments when relatively small black holes and dead stars crash into each other, Mingarelli said. The black holes send off gravitational waves as they circle around in these pairings, known as binaries. The results released this week included 15 years of data from NANOGrav, which has been using telescopes across North America to search for the waves. Other teams of gravitational wave hunters around the world also published studies, including in Europe, India, China and Australia.
By analyzing tiny changes in the ticking rate across different pulsars — with some pulses coming slightly early and others coming late — scientists could tell that gravitational waves were passing through.
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