Gravitational Waves Detected


Time: 4:15 p.m. CEST

One hundred years after modern physicist Albert Einstein predicted in 1916 massive objects rotating will make space-time ripples, or gravitational waves, a team of scientists announced on Thursday “they heard and recorded the sound of two black holes, colliding a billion light-years away.” The scientists, a great achievement of three physicists-Kip Thorne of the California Institute of Technology, Rainer Weiss of the Massachusetts Institute of Technology and Ronald Drever, retired in Scotland, engaged their careers to measure Einstein’s notions.

“We had detected gravitational waves. We did it,” David Reitze, from Ligo Caltech said on February 11, as the Associated Press video shows. Another scientists in the cooperation, Gabriela Gonzalez explained the sound, “This is it. This is how we know that we have gravitational waves. And the frequencies of these waveforms are in the human hearing range. We can hear gravitational waves. We can hear the universe.” Gonzales explained.

On September 14, loud signal came through at the Livingston site. “Data was streaming, and then ‘bam,’ ”recalled David Reitze, a Caltech professor who is the director of the LIGO Laboratory, the group that built and runs the detectors. After seven milliseconds, the signal hit the site at Hanford. The computer tagged the event, noticed by European colleagues.

The sound the physicists recorded and heard, or the chirp, as explained, is first direct evidence of gravitational waves, the ripples in the space-time Einstein envision 100 years ago. The record completes famous physicist vision of the space and time, dynamic and able to stretch or shrink. That is a confirmation of the black holes nature, the gravitational pits, and notion that even light cannot escape of it.

The physicists, or a pair of L-shaped antennas in Washington State and Louisiana known as Laser Interferometer Gravitational Wave Observatory, LIGO catch the sound of the ways five months ago on September 14, 2015. This chirp represents proof for the National Science Foundation, and the financial support to the project, which is $1.1 billion over more than 40 years, despite the criticism the sound was not loud enough to justify the cost.

Members of the LIGO group, together with a scientists from Europe, named as the Virgo Collaboration, published a report in Physical Review Letters on Thursday with more than 1.000 authors says the New York Times.

The Times says, if replicated by future experiments, which is like middle C before abruptly stopping, seems destined to take its places among the great sound bites of science, ranking with Alexander Graham Bell’s ‘Mr. Watson- come here’ and Sputnik’s first beeps from orbit.

The detection of gravitational waves marks the culmination of a decades-long quest that began in 1972, says Sciencemag.org, when Weiss created the basic design of LIGO. Seven years after, the National Science Foundation funded research and development work at both MIT and Caltech. LIGO construction started in 1994. The first data by the instruments was gathered in 2001.

President Barack Obama greeted the achievement posting on Twitter.

Einstein created his theory century ago and rewrote the rules for space and time and said, the matter and energy distort the geometry of the universe.

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