NASA Announces Results of Epic Space-Time Experiment


Source: NASA Science | Science News, May 4, 2011
[News From Behind the Scenes, Friday, May 13, 2011 @ 6:00 PM]

An artist's concept of GP-B measuring the curved spacetime around Earth (click on image)
Einstein was right again. There is a space-time vortex around Earth, and its shape precisely matches the predictions of Einstein’s theory of gravity.

Researchers confirmed these points at a press conference today at NASA headquarters where they announced the long-awaited results of Gravity Probe B (GP-B).

“The space-time around Earth appears to be distorted just as general relativity predicts,” says Stanford University physicist Francis Everitt, principal investigator of the Gravity Probe B mission.

“This is an epic result,” adds Clifford Will of Washington University in St. Louis. An expert in Einstein’s theories, Will chairs an independent panel of the National Research Council set up by NASA in 1998 to monitor and review the results of Gravity Probe B. “One day,” he predicts, “this will be written up in textbooks as one of the classic experiments in the history of physics.”

Time and space, according to Einstein’s theories of relativity, are woven together, forming a four-dimensional fabric called “space-time.” The mass of Earth dimples this fabric, much like a heavy person sitting in the middle of a trampoline. Gravity, says Einstein, is simply the motion of objects following the curvaceous lines of the dimple.

If Earth were stationary, that would be the end of the story. But Earth is not stationary. Our planet spins, and the spin should twist the dimple, slightly, pulling it around into a 4-dimensional swirl. This is what GP-B went to space in 2004 to check.

The idea behind the experiment is simple:

Put a spinning gyroscope into orbit around the Earth, with the spin axis pointed toward some distant star as a fixed reference point. Free from external forces, the gyroscope’s axis should continue pointing at the star–forever. But if space is twisted, the direction of the gyroscope’s axis should drift over time. By noting this change in direction relative to the star, the twists of space-time could be measured.

In practice, the experiment is tremendously difficult.

One of the super-spherical gyroscopes of Gravity Probe B. (click on image)
The four gyroscopes in GP-B are the most perfect spheres ever made by humans. These ping pong-sized balls of fused quartz and silicon are 1.5 inches across and never vary from a perfect sphere by more than 40 atomic layers. If the gyroscopes weren’t so spherical, their spin axes would wobble even without the effects of relativity.

According to calculations, the twisted space-time around Earth should cause the axes of the gyros to drift merely 0.041 arcseconds over a year. An arcsecond is 1/3600th of a degree. To measure this angle reasonably well, GP-B needed a fantastic precision of 0.0005 arcseconds. It’s like measuring the thickness of a sheet of paper held edge-on 100 miles away.

“GP-B researchers had to invent whole new technologies to make this possible,” notes Will.

They developed a “drag free” satellite that could brush against the outer layers of Earth’s atmosphere without disturbing the gyros. They figured out how to keep Earth’s magnetic field from penetrating the spacecraft. And they created a device to measure the spin of a gyro–without touching the gyro. More information about these technologies may be found in the Science@NASA story “A Pocket of Near-Perfection.”

Pulling off the experiment was an exceptional challenge. But after a year of data-taking and nearly five years of analysis, the GP-B scientists appear to have done it.

“We measured a geodetic precession of 6.600 plus or minus 0.017 arcseconds and a frame dragging effect of 0.039 plus or minus 0.007 arcseconds,” says Everitt.

For readers who are not experts in relativity: Geodetic precession is the amount of wobble caused by the static mass of the Earth (the dimple in spacetime) and the frame dragging effect is the amount of wobble caused by the spin of the Earth (the twist in spacetime). Both values are in precise accord with Einstein’s predictions.

“In the opinion of the committee that I chair, this effort was truly heroic. We were just blown away,” says Will.

An artist's concept of twisted spacetime around a black hole. Credit: Joe Bergeron of Sky & Telescope magazine.
The results of Gravity Probe B give physicists renewed confidence that the strange predictions of Einstein’s theory are indeed correct, and that these predictions may be applied elsewhere. The type of spacetime vortex that exists around Earth is duplicated and magnified elsewhere in the cosmos–around massive neutron stars, black holes, and active galactic nuclei.

“If you tried to spin a gyroscope in the severely twisted space-time around a black hole,” says Will, “it wouldn’t just gently precess by a fraction of a degree. It would wobble crazily and possibly even flip over.”

In binary black hole systems–that is, where one black hole orbits another black hole–the black holes themselves are spinning and thus behave like gyroscopes. Imagine a system of orbiting, spinning, wobbling, flipping black holes! That’s the sort of thing general relativity predicts and which GP-B tells us can really be true.

The scientific legacy of GP-B isn’t limited to general relativity. The project also touched the lives of hundreds of young scientists:

“Because it was based at a university many students were able to work on the project,” says Everitt. “More than 86 PhD theses at Stanford plus 14 more at other Universities were granted to students working on GP-B. Several hundred undergraduates and 55 high-school students also participated, including astronaut Sally Ride and eventual Nobel Laureate Eric Cornell.”

NASA funding for Gravity Probe B began in the fall of 1963. That means Everitt and some colleagues have been planning, promoting, building, operating, and analyzing data from the experiment for more than 47 years—truly, an epic effort.

What’s next?

Everitt recalls some advice given to him by his thesis advisor and Nobel Laureate Patrick M.S. Blackett: “If you can’t think of what physics to do next, invent some new technology, and it will lead to new physics.”

“Well,” says Everitt, “we invented 13 new technologies for Gravity Probe B. Who knows where they will take us?”

This epic might just be getting started, after all….

Author: Dr. Tony Phillips | Credit: Science@NASA

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11 thoughts on “NASA Announces Results of Epic Space-Time Experiment

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  2. IAmLonefrog

    http://video.google.com/googleplayer.swf?docid=6151699791256390335&hl=en&fs=true

    I’m not trying to be overly simplistic here, but after this mountain of an exercise in logic, Nassim is simply stating that we have been lied to and “they” have been creating this unbalanced world ever since.

    Ex: @ 2:53:41 in the first video,”Quantum Physics is bunk”. Why? – instead of re-examining Newton’s Law (Natural Law) in relation to why the nucleus of an atom doesn’t just “fly apart” because of all the positive charge going on, they just invented a new type of physics to deal with it.

    In other words, these Natural Laws are based on something not found in nature = an isolated system. Reminds me of when Celtic Rebel and Alex NZ dissected the word APPLE = A Pill. We were all swallowing this “Newtonian” creation that no longer (and never did) address the situation.

    Another Ex: @ 2:35:56 in the first video. “We live in a black hole”. Radition generates curves or open feedbacks which creates a fractal. Anyway, he says where we experience gravity/electricity is a “white hole”. Yin and Yang?

    Interestingly enough, NASA’S shiny balls only backup what Nassim has already put on record. Is this an example of redirection or a pre-emptive “recording” of history for future texts?

    1. Paul

      V interesting mr lonefrog :) I have no doubt that it wouldnt be the first time we’ve been misled. It’s difficult to know the ‘truth’ about these subjects not being a quantum physicist – but u again demonstrate that we shouldn’t take anything for granted….

      I suppose I have my own theories about life, the universe, and everything and find meaning and proof to support my ideas – it’s well proven isn’t it – that even at a scientific experimental level, scientists of all kinds can unconsciously sway their own results to back up their hypotheses.

      Sorry if I’ve misunderstood what you’ve been saying – a lt of it is quite weighty to dip into. Thanks again. Very compelling

      1. IAmLonefrog

        Intuition leads to real discovery, because the intuitive type will not settle for being fooled or fooling themselves, much less spend time trying to fool others.

        Therefore “unconsciously” doesn’t factor in. Being programmed is a whole new ballgame though.

        1. Paul

          Yep. Agreed. I think I can overthink things sometimes though – and when u have two conflicting yet completing arguments… Well.

          On the spiritual side of things I let my intuition guide me. From the scientific perspective I suppose I soak it all up and try to come to my own conclusion – yet that’s kinda quasi science….

          Maybe I need to read more. Haha. Yet I don’t trust many of the scientists – mr hawkings for example has gone way down in my estimation of late!!

          Thanks again my frog. U provide me with some great insights and perspectives ibhavent considered

      1. IAmLonefrog

        I got the distinct feeling when reading this NASA blurb that one of the “new” technologies was the “creation of a story”. (well, not so new really) Although, when properly applied it can be used as a platform to introduce the “technologies of others”.

        aka…..

        Is that Joseph Hiddinck’s sphere? More reversed engineered alien technology? Blah blah blah…..

        One thing IAm certain of, NASA lies.

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