A Guinness attempt
Students form a ‘My Teacher is My Hero’ sentence as part of their attempt to achieve a Guinness World Record for Largest Human Sentence to mark National Teacher’s Month at the open field of the University of Santo Tomas in Manila, Philippines, on Friday
Reuters LONDON: Scientists have made the fourth detection of gravitational waves — ripples in the fabric of space and time — formed by the collision of two massive black holes located about 1.8 billion light-years away.
The signal was recorded on August 14 by the Virgo detector located in Italy, and the two Laser Interferometer G r av i t at i o n a l - Wave O b s e r vat o r y (LIGO) detectors located in the United States.
It is the first joint detection of gravitational waves with the Virgo and LIGO collaborations. The transient gravitational-wave signal was produced by the collision of two stellar mass black holes, researchers said.
The detected gravitational waves were emitted during the final moments of the merger of two black holes with masses about 31 and 25 times the mass of the Sun and located about 1.8 billion light-years away.
The newly-produced spinning black hole has about 53 times the mass of our sun, which means that about three solar masses were converted into gravitational-wave energy during the merger.
“It is wonderful to see a first gravitational-wave signal in our brand new Advanced Virgo detector only two weeks after it officially started taking data,” said Jo van den Brand from Vrije Universiteit (VU) Amsterdam in the Netherlands, spokesperson of the Virgo collaboration.