For Second Time, LIGO Detects Gravitational WavesThe article reports on the detection of gravitational waves by a team of scientists using the twin Laser Interferometer Gravitational-wave Observatory (LIGO) interfer...
100 years ago, Albert Einstein proposed the existence of gravitational waves. But while mathematics led to his hypothesis that gravitational waves existed, he believed that actuallydetectingthem would be virtually impossible – they were infinitesimally small. ...
Advanced LIGO is a second-generation gravitational-wave detector consisting of the two identical interferometers in Hanford and Livingston, and uses precision laser interferometry to detect gravitational waves. Beginning operating in September 2015, Advanced LIGO has conducted two observing runs. The second...
The detected gravitational waves—ripples in space and time—were emitted during the final moments of the merger of two black holes, one with a mass about 31 times that of our sun, the other about 25 times the mass of the sun. The event, located about 1.8 billion light-years away result...
When gravitational waves pass through this device, they cause the length of the two arms to alternately stretch and squeeze by infinitesimal amounts, tremendously exaggerated here for visibility. This movement causes the light beam that hits the detector to flicker. ...
Similarly, since effects of gravity must travel at a finite speed, the gravitational effects of orbiting objects must create waves. The only question is the specific properties those waves might have. No one, therefore, should be surprised that gravitational waves exist, or that they travel at ...
The discovery of the gravitational-wave (GW) source GW150914 with the Advanced LIGO detectors provides the first observational evidence for the existence o... BP Abbott,R Abbott,TD Abbott,... - 《Astrophysical Journal》 被引量: 153发表: 2016年 Search for gravitational waves from binary black ...
The LIGO (laser interferometer gravitational-wave observatory) detector is a complex Fabry-Perot/Michelson interferometer, designed to detect gravitational waves (GW) from astrophysical sources. When a GW strikes the detector, the underlying space will be extended in one direction and contracted in the...
“With these new coatings, we expect to be able to increase the detection rate of gravitational waves from once a week to once a day or more,” says David Reitze, executive director of LIGO Laboratory at Caltech. The research, which may have future applications in the field...
India has approved the construction of LIGO-India, a gravitational-wave observatory that will join a global network, enhancing the ability to pinpoint sources ofgravitational wavesand answer fundamental questions about the universe. The Indian government has granted the final approvals necessary for con...