Gravitational waves: A leap towards theory of everything, a moment that rivals Galileo

Gravitational waves detected, Einstein vindicated after 100 yrs

By: AP | Washington | Updated: February 12, 2016 1:27 pm
gravitational waves, Albert Einstein, einstein, einstein garvitational waves theory, General Theory of Relativity, Caltech, MIT, LIGO, LIGO gravitational waves, IUCAA, IUCAA pune, Ligo project IUCAA, india news, science news, latest news Dr. David Reitze, Executive Director of the LIGO Laboratory at Caltech, shows the merging of two black holes at a news conference to discuss the detection of gravitational waves, ripples in space and time hypothesized by physicist Albert Einstein a century ago, in Washington.  (Source: Reuters)

In an announcement that electrified the world of astronomy, scientists said Thursday that they have finally detected gravitational waves, the ripples in the fabric of space-time that Albert Einstein predicted a century ago. Some scientists likened the breakthrough to the moment Galileo took up a telescope to look at the planets.

Watch Video: Gravitational waves from black holes discovered

The discovery of these waves, created by violent collisions in the universe, excites astronomers because it opens the door to a new way of observing the cosmos. For them, it’s like turning a silent movie into a talkie because these waves are the soundtrack of the cosmos.

LIGO scientific collaboration has confirmed discovery of gravitational waves using its detectors LIGO scientific collaboration has confirmed discovery of gravitational waves using its detectors

“Until this moment we had our eyes on the sky and we couldn’t hear the music,” said Columbia University astrophysicist Szabolcs Marka, a member of the discovery team. “The skies will never be the same.”

An all-star international team of astrophysicists (including from India) used a newly upgraded and excruciatingly sensitive $1.1 billion instrument known as the Laser Interferometer Gravitational-Wave Observatory, or LIGO, to detect a gravitational wave from the distant crash of two black holes, one of the ways these ripples are created.

To make sense of the raw data, the scientists translated the wave into sound. At a news conference, they played what they called a “chirp” — the signal they heard on September 14. It was barely perceptible even when enhanced.

Gravitational waves, ligo, Einstein

Must Read| Gravitational waves: Why science expects to create a ripple today

Some physicists said the finding is as big a deal as the 2012 discovery of the subatomic Higgs boson, sometimes called the “God particle”. Some said this is bigger.

“It’s really comparable only to Galileo taking up the telescope and looking at the planets,” said Penn State physics theorist Abhay Ashtekar, who wasn’t part of the discovery team. “Our understanding of the heavens changed dramatically”.

Gravitational waves, first theorised by Einstein in 1916 as part of his theory of general relativity, are extraordinarily faint ripples in space-time, the hard-to-fathom fourth dimension that combines time with the familiar up, down, left and right. When massive but compact objects like black holes or neutron stars collide, they send gravity ripples across the universe.

Scientists found indirect proof of the existence of gravitational waves in the 1970s — computations that showed they ever so slightly changed the orbits of two colliding stars — and the work was honoured as part of the 1993 Nobel Prize in physics. But Thursday’s announcement was a direct detection of a gravitational wave.

And that’s considered a big difference.

“It’s one thing to know soundwaves exist, but it’s another to actually hear Beethoven’s Fifth Symphony,” said Marc Kamionkowsi, a physicist at Johns Hopkins University who wasn’t part of the discovery team. “In this case we’re actually getting to hear black holes merging.”

LIGO scientists claim that the gravitational waves originated from collision of two black holes LIGO scientists claim that the gravitational waves originated from collision of two black holes

Gravitational waves are the “soundtrack of the universe”, said team member Chad Hanna of Pennsylvania State University.

Detecting gravitational waves is so difficult that when Einstein first theorised about them, he figured scientists would never be able to hear them. Einstein later doubted himself and even questioned in the 1930s whether they really do exist, but by the 1960s scientists had concluded they probably do, Ashtekar said.

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In 1979, the National Science Foundation decided to give money to the California Institute of Technology and the Massachusetts Institute of Technology to come up with a way to detect the waves.

Twenty years later, they started building two LIGO detectors in Hanford, Washington, and Livingston, Louisiana, and they were turned on in 2001. But after years with no luck, scientists realised they had to build a more advanced detection system, which was turned on last September.

“This is truly a scientific moonshot and we did it. We landed on the moon,” said David Reitze, LIGO’s executive director.

The new LIGO in some frequencies is three times more sensitive than the old one and is able to detect ripples at lower frequencies that the old one couldn’t. And more upgrades are planned.

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  1. M
    Manmohan Singh
    Feb 11, 2016 at 7:07 pm
    Really really mysterious thing found. It will also open the door to create instruments to travel into the space.
    Reply
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      Deepanshu puri
      Feb 11, 2016 at 6:06 pm
      Superb after a long tyme itz come to true Einstein prediction... I m too excited to learn more about it ND waiting for new updates
      Reply
      1. S
        Shiv Sharma
        Feb 11, 2016 at 7:09 pm
        This discovery is nothing compared to the inter planetary spaceships invented by vedic brahmins!
        Reply
        1. D
          du
          Feb 11, 2016 at 8:02 pm
          No Indian-origin-Indo-BRAHM in the team or did America Brahmin Foundation operating in the name of America Hindu Foundation did not pull the right strings?
          Reply
          1. S
            Saurabh
            Feb 12, 2016 at 2:21 pm
            Discovery by vedic brahmins...GHANTA
            Reply
            1. S
              Srinivasan Ranganathan
              Feb 12, 2016 at 7:12 pm
              This breakthrough opens up a w new world of knowledge equal or more than all the knowledge of the universe we have known so far. We will be going into unchartered and unknown territory in astrophysics. The next decade or two will see a quantum jump in our knowledge of the universe.
              Reply
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                Manali kini
                Feb 11, 2016 at 5:09 pm
                It's really great discovery. I'll have to be known more about this gravitational wave.
                Reply
                1. B
                  Brahmin.sluggard
                  Feb 12, 2016 at 1:21 pm
                  AND REMEMBER 1915 WAS ALSO THE YEAR THAT ARTASHASTRA WAS "REDISCOVERED" AFTER 3000 YEARS. AND SINCE IT SUPPORTS BRAHMIN GENE AND BLOOD, I BELIEVE THAT DISCOVERY. BUT REAL SCIENCE IS AGAINST ARTASHASTRA I DONT BELIEVE THAI GR DISCOVERY.
                  Reply
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                    AKP
                    Feb 12, 2016 at 2:06 am
                    The universe in terms of the Ved is much more than this.Science can only discover them now or later,but cannot discover all till generations.Let us read ,understand and research to speed up many discoveries for science.
                    Reply
                    1. S
                      sps
                      Feb 11, 2016 at 5:22 pm
                      One more step towards knowing the unknown.
                      Reply
                      1. S
                        Stupid Guy
                        Feb 13, 2016 at 3:49 am
                        More made up Liberal nonsense. Get a brain, fools.
                        Reply
                        1. K
                          Kaliyug
                          Feb 12, 2016 at 4:32 pm
                          There are a lot of American names on the list but the real person who found this happened to be a Indian named Sanjeev Duhar from Pune University. Stop recognizing people who come to the party but have never invested in it.
                          Reply
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                            Michael
                            Feb 12, 2016 at 6:28 am
                            Einstein theory's was never wrong, the great scientist ever.
                            Reply
                            1. A
                              Aditya
                              Feb 12, 2016 at 2:27 am
                              Really excited!!! now more things will be unveiled after its discovery.
                              Reply
                              1. S
                                Sudeep Kanjilal
                                Feb 12, 2016 at 12:49 am
                                Relax! Its is a different galaxy, and took place a billion years ago :)
                                Reply
                                1. D
                                  Deepanshumishra
                                  Feb 11, 2016 at 5:32 pm
                                  This proofs that there is more things to discover
                                  Reply
                                  1. D
                                    Devika Nair
                                    Feb 12, 2016 at 1:34 am
                                    Really fascinated to know more about the cosmos and beginning of universe...
                                    Reply
                                    1. D
                                      Dharmarajan
                                      Feb 11, 2016 at 5:02 pm
                                      Informative
                                      Reply
                                      1. D
                                        dipshikha
                                        Feb 12, 2016 at 4:21 am
                                        This is a big discovery.Einstein was right
                                        Reply
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                                          BharatLal
                                          Feb 12, 2016 at 9:52 am
                                          Did they hear AUM sound. It is all puzzling, and will be refuted after few years. Don't trust everything.
                                          Reply
                                          1. G
                                            Gonai
                                            Feb 11, 2016 at 9:31 pm
                                            Is there any danger to us regarding with black s?
                                            Reply
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