Image: NASA
Gravity Probe B orbited Earth to measure spacetime. If gravity is like a bowling ball on a sheet, Earth makes one big bowling ball! The lines show that mass distorts spacetime, producing a result that feels like gravity.
Publicado por The Why Files.
Gravity is a drag… and Einstein’s right again!
Photo: Albert-Einstein-Archiv, Jerusalem, Lucien Chavan
Albert, Einstein was a patent clerk in 1905, the year he published his first paper on special relativity, one of the most profound insights into the nature of reality.
On May 4, scientists announced success after a 50-year quest to measure two key consequences of Einstein’s theory of general relativity. The most perfectly round objects ever created by human hand, spinning aboard a spaceship launched in 2004, have detected infinitesimal disturbances in spacetime, the invisible fourth dimension of the universe:
Earth’s gravity warps spacetime through the “geodetic effect,” which subtracts one inch per year from the circumference of the spaceship’s orbit; and
Earth’s rotation pulls spacetime around with it.
Each year, through “frame dragging,” the spinning planet drags spacetime, producing a
slight deviation equivalent to the width of a human hair, seen from 10 miles away.
To The Why Files, frame-dragging means that space is no longer flat, or even just warped.
It is also twisted. And as a matter of principle, The Why Files likes twisted.
Photo: Albert-Einstein-Archiv, Jerusalem, Lucien Chavan
Albert, Einstein was a patent clerk in 1905, the year he published his first paper on special relativity, one of the most profound insights into the nature of reality.
Earth’s gravity warps spacetime through the “geodetic effect,” which subtracts one inch per year from the circumference of the spaceship’s orbit; and Earth’s rotation pulls spacetime around with it.
Each year, through “frame dragging,” the spinning planet drags spacetime, producing a
slight deviation equivalent to the width of a human hair, seen from 10 miles away.
To The Why Files, frame-dragging means that space is no longer flat, or even just warped.
It is also twisted. And as a matter of principle, The Why Files likes twisted.
Continue lendo em http://whyfiles.org/2011/the-importance-of-being-einstein/
Tradução:
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Image: Stanford
Gravity Probe B used these nearly perfect
gyroscope rotors to measure how mass affects spacetime
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A gravidade da Terra deforma o espaço-tempo através do "efeito geodésico", o qual subtrai uma polegada por ano a partir da circunferência da órbita da nave espacial, eRotação da Terra puxa o espaço-tempo ao redor, com ela. A cada ano, através de "arrastamento", a rotação do planeta draga/arrasta o espaço-tempo, produzindo um ligeiro desvio equivalente à largura de um cabelo humano, visto a partir de 10 milhas de distância.Para The Why Files, ''frame-dragging'' significa que o espaço não é mais plano, ou até mesmo deformado. Também é torcido.
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Crédito: The Why Files
http://whyfiles.org/2011/the-importance-of-being-einstein/
http://whyfiles.org/2012/einstein-2/
animação em:
http://einstein.stanford.edu/Media/Rel_gyro_expt-anima-flash.html
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