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-------------------------- 2457 - GRAVITY WAVES - proving their existence ?
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- Wouldn’t you know it. Albert Einstein came up with the existence of gravity waves before anyone else even thought about it. In 1916 he published a paper on how two massive objects orbiting each other would throw off waves of space-time expanding and contracting sand traveling at the speed o light.
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- When two merging blackholes collide they produce these gravity waves that travel through the fabric of spacetime passing through Earth undetected
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- Einstein’s calculations concluded that the waves would be so feeble as to defy science the ability to ever detect them. Albert had no way of predicting that in 100 years astronomers could have a billion dollar interferometer with perpendicular arms that were 2.5 miles long. Such an instrument was created for just this purpose: prove Einstein’s predictions right, gravity waves do exist.
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- 100 years later the Laser Interferometer Gravitational Observatory , LIGO, detected the first waves. The objects that created these waves were two blackholes orbiting each other very rapidly just before merging into a single giant blackhole. The two blackholes were 36 and 29 solar mass.
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- When the colliding blackholes came together they converted 3 solar mass into pure gravitational energy. This enormous gravitation conversion of energy amounted to a peak power output of energy power 50 times greater than that from the entire visible universe.
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- It took 1,300,000,000 years for this energy wave to reach us traveling at the speed of light. The expansion and contraction of the wave amounted to 1/ 10,000th the width of a proton. How on Earth could it ever be detected?
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- To visualize these dimensions the measurement would have the precision to measure the width of a human hair out of a 25 trillion mile distance.
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- See Reviews about LIGO to learn more about this amazing instrument. It uses near infrared lasers in vacuum tunnels with polished mirrors on the ends that are smooth to the widths of atoms.
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- By 2018 astronomers have detected 5 pairs of blackholes and one pair of merging neutron stars.
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- To learn more astronomers plan to put an interferometer in outer space. This orbiting spacecraft would form an equilateral triangle of interferometers that could measure distortions is spacetime passing through our solar system.
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- Other Reviews available include 1728 that goes into more detail of how these gravity waves can be used to measure our universe. Reviews 1155 and 917 also describe more on “what are gravity waves?” Hope you learned something new from this review.
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- October 22, 2019 2457
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--------------------- Tuesday, October 22, 2019 --------------------
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