Physics for the second time in the history of science have registered gravitational waves – space and astronomy news

December 26, 2015 at 3:38:53 UTC scientists observed gravitational waves – ” ripple “of space-time -. the second time

These gravitational waves have been detected using two detectors Observatory Laser Interferometer gravitational-wave Observatory (LIGO), located respectively in Livingston, Louisiana and the city of Hanford, Washington, United States.

gravitational waves carry information about the species of the cosmic source, and in addition, they provide important information about the nature of gravity that can not be obtained by other methods, and a new study of physics come concluded that the newly discovered gravitational waves formed in the last moments of the merger of two black holes – the masses of 14 and 8 solar masses -. to form one massive rotating black hole mass of 21 solar masses

«it is very important that these black holes were less massive than the black hole at the first detection of gravitational waves – said Gabriela Gonzalez, a spokesman for the observatory LIGO Scientific collaboration and professor of physics and astronomy, Louisiana State University, USA. – Due to the fact that they have a smaller mass compared with the first detection, they spend more time – about a second – in the band detector sensitivity. This means that we have the prospect to make in the coming years more “census” of black holes in our universe

. »At the same collision that occurred about 1.4 billion years ago, the amount of energy equivalent to about one weight Sun, was converted into gravitational waves. The detected signal was coming from black holes, committing the last 27 turns in its orbit before the final merger. Based on the signal arrival times – Check events Livingstone detector occurred for 1.1 milliseconds before its registration Hanford detector – can be roughly determined by the position of the signal source, the scientists say

On the first detection of gravitational waves was announced February 11, 2016. city, and this event has become a milestone in the history of physics and astronomy: it confirmed the importance of having a great outlook of Einstein’s theory of relativity, and marked the beginning of the era of gravitational wave astronomy

A study on the detection, appeared in the journal Physical. Review Letters.