The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. Previously, gravitational waves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems. The waveform, detected by both LIGO observatories, matched the predictions of general relativity for a gravitational wave emanating from the inward spiral and merger of a pair of black holes of around 36 and 29 solar masses and the subsequent "ringdown" of the single resulting black hole. The signal was named GW150914. It was also the first observation of a binary black hole merger, demonstrating both the existence of binary stellar-mass black hole systems and the fact that such mergers could occur within the current age of the universe. This first direct observation was reported around the world as a remarkable accomplishment for many reasons.Wikipedia
The first direct observation of gravitationalwaves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. [3] [4] [5] Previously, gravitationalwaves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems.The waveform, detected by both LIGO observatories, [6] matched the predictions of general ...
Gravitationalwaves are transient displacements in a gravitational field—generated by the relative motion of gravitating masses—that radiate outward from their source at the speed of light. [1] ... In 1993, Russell Alan Hulse and Joseph Hooton Taylor Jr. received the Nobel Prize in Physics for this discovery.
Jun 29, 2023Four separate studies on the discovery of the gravitationalwave background have been published in The Astrophysical Journal Letters: The NANOGrav 15-year Data Set: Evidence for a Gravitational ...
The discovery was made possible by the enhanced capabilities of Advanced LIGO, a major upgrade that increases the sensitivity of the instruments compared to the first generation LIGO detectors, enabling a large increase in the volume of the universe probed—and the discovery of gravitationalwaves during its first observation run.
Though Einstein predicted the existence of gravitationalwaves in 1916, the first proof of their existence didn't arrive until 1974. In that year, two astronomers, Russell Hulse and Joseph Taylor, using the Arecibo Radio Observatory in Puerto Rico discovered a binary pulsar 21000 light years from Earth. This was exactly the type of system that general relativity predicted should radiate ...
Jun 28, 2023The discovery, made by the North American Nanohertz Observatory for GravitationalWaves (NANOG rav), helps confirm the accuracy of standard models of galaxy formation and black hole growth. NANOG rav scientists, including Yale's Chiara Mingarelli, published the discovery in a quintet of new studies June 29 in The Astrophysical Journal Letters.
Dec 17, 2024Gravitationalwave, the transmission of variations in the gravitational field as waves, first directly observed in 2015. ... The observed decrease in the orbital period in the years since the discovery of the binary pulsar does indeed indicate that the two stars are spiraling toward one another at exactly the predicted rate. Gravitational ...
Dennis Overbye of The New York Times reports on the discovery of gravitationalwaves. Overbye explains that the detection is a "triumph for three physicists — Kip Thorne of the California Institute of Technology, Rainer Weiss of the Massachusetts Institute of Technology and Ronald Drever — who bet their careers on the dream of measuring ...
The probable location of a black hole collision that spawned gravitationalwaves detected by the Laser Interferometer Gravitational-Wave Observatory is shown in this still from a National Science ...
The new LIGO discovery is the first observation of gravitationalwaves themselves, made by measuring the tiny disturbances the waves make to space and time as they pass through the earth. LIGO research is carried out by the LIGO Scientific Collaboration (LSC), a group of more than 1000 scientists from universities around the United States and ...