US physicists awarded Nobel Prize for work on gravitational waves

FILE - In this file photo dated Thursday, Feb. 11, 2016, Laser Interferometer Gravitational-Wave Observatory (LIGO) Co-Founders Rainer Weiss, left, and Kip Thorne, right, participate in a news conference at the National Press Club in Washington, as it is announced that scientists they have finally detected gravitational waves. The Nobel Physics Prize 2017 is announced Monday Oct. 3, 2017, awarded jointly to three scientists Rainer Weiss of the Massachusetts Institute of Technology, and Barry Barish and Kip Thorne of the California Institute of Technology. (AP Photo/Andrew Harnik, FILE)

STOCKHOLM (NBC) — Three U.S. physicists won the Nobel Prize in Physics on Tuesday for their work that led to the detection of gravitational waves — the ripples in space-time made when black holes collide and when other big cosmic events happen.

Kip Thorne and Barry Barish of the California Institute of Technology and Rainer Weiss of the Massachusetts Institute of Technology split the $1 million prize, awarded for their work in designing and developing the detectors that proved the waves exist.

Breakthrough: Scientists detect Einstein-predicted ripples

“This year’s prize is about a discovery that shook the world,” the Nobel committee’s Göran Hansson said in making the announcement.

Kip Thorne, 77, may be one of the best-known names in science. The Caltech physicist has written several popular books that have made arcane ideas such as wormholes, time travel and gravity understandable to non-scientists.

It was his work on gravitational waves that got him a share of the Nobel, considered the premier prize in science. The Nobel Committee specifically named their work on LIGO, the Laser Interferometer Gravitational-Wave Observatory.

“Pioneers Rainer Weiss and Kip S. Thorne, together with Barry C. Barish, the scientist and leader who brought the project to completion, have ensured that more than four decades of effort led to gravitational waves finally being observed,” the committee said in its announcement.

The collision of two black holes holes–a tremendously powerful event detected for the first time ever by the Laser Interferometer Gravitational-Wave Observatory, or LIGO–is seen in this still from a computer simulation. Credit: Caltech / MIT/LIGO Laboratory

“The 2017 Nobel Laureates have, with their enthusiasm and determination, each been invaluable to the success of LIGO,” it added.

The Berlin-born Weiss, 85, gets half the prize. Thorne and Barish, 81, split the other half.

“LIGO is no ordinary telescope for detecting light and other electromagnetic radiation from space. It is an instrument for listening to space’s gravitational waves; even if gravitational waves are tremors in spacetime itself, and not sound waves, their frequency is equivalent to those we can hear with our human ears,” the committee said.

“Many of us who work on this fully expect that we are going to learn about things we didn’t know about,” Weiss said by phone to the Nobel committee as they made the announcement.

More than 20,000 people have worked on LIGO, which has one detector in Louisiana and a second in Washington state.

Carlos Lousto of the Rochester Institute of Technology is one of them. He’d been up in the early morning hours in the hope that the trio would win. “We are very happy to hear the news,” he said.

FILE – In this file photo dated Thursday, Feb. 11, 2016, Laser Interferometer Gravitational-Wave Observatory (LIGO) Co-Founder Kip Thorne speaks during a news conference at the National Press Club in Washington, USA, to announce that scientists have finally detected gravitational waves. The Nobel Physics Prize 2017 is announced Monday Oct. 3, 2017, awarded to 3 scientists including Kip Thorne, for discoveries in gravitational waves. (AP Photo/Andrew Harnik, FILE)

Nobel prizes are never announced ahead of time. Researchers are often awakened with a surprise phone call from Stockholm, where the prizes are decided and awarded. But the physics world had widely anticipated this one and the three researchers, along with others, have won several other prizes and commendations for the work.

The 2015 announcement that LIGO had detected gravitational waves shook the science world and provided hard evidence to back up Einstein’s prediction about gravitational waves in his General Theory of Relativity.

“The signal was extremely weak when it reached Earth, but is already promising a revolution in astrophysics. Gravitational waves are an entirely new way of observing the most violent events in space and testing the limits of our knowledge,” the Nobel committee said.

“Now we can see them,” Lousto said. “Now we can see this dark part of the universe.”

Just last month the team announced they’d added a third leg to the continent-wide observatory: the Italian-based Virgo helped triangulate an observation of a gravitational wave along with LIGO.

The Nobel Prize in Chemistry will be announced Wednesday. There are also prizes for economics and for peace.