Latest Tests of general relativity Stories

2008-10-09 03:00:19

By Anonymous A study of two unequal mass stars in close orbits has produced results in keeping with Einstein's theory of general relativity. "Einstein's theory predicts that stars in such a system will come closer and closer to each other as they lose energy due to gravitational radiation," says Dr Rhamesh Bhat of Swinburne University's Centre for Astrophysics and Supercomputing. "Previous research has supported Einstein's theory in this context." Such tests are applied quite frequently...

2008-06-23 17:35:27

XMM-Newton has, for the first time, detected signals from both stars of a binary pulsar system in X-rays, unveiling a scientific goldmine. Each star of the closely-packed system is a dense neutron star, spinning extremely fast, radiating X-rays in pulses. The binary pulsar PSR J0737-3039 was first spotted by astronomers in 2003 in radio wavelengths. X-rays can be used to probe deeper and study the system more thoroughly. To see two pulsars orbiting each other in a binary system is extremely...

2008-04-08 15:55:00

The same team of astrophysicists that cracked the computer code simulating two black holes crashing and merging together has now, for the first time, caused a three-black-hole collision.Manuela Campanelli, Carlos Lousto and Yosef Zlochower"”scientists in Rochester Institute of Technology's Center for Computational Relativity and Gravitation"”simulated triplet black holes to test their breakthrough method that, in 2005, merged two of these large mass objects on a supercomputer...

2007-04-17 13:00:00

For the past three years a satellite has circled the Earth, collecting data to determine whether two predictions of Albert Einstein's general theory of relativity are correct. Today, at the American Physical Society (APS) meeting in Jacksonville, Fla., Professor Francis Everitt, a Stanford University physicist and principal investigator of the Gravity Probe B (GP-B) Relativity Mission, a collaboration of Stanford, NASA and Lockheed Martin, will provide the first public peek at data that will...

2005-11-22 14:05:00

NASA's Gravity Probe B spacecraft has gathered all the data physicists need to check a bizarre prediction of Einstein's relativity. NASA -- Is Earth in a vortex of space-time? We'll soon know the answer: A NASA/Stanford physics experiment called Gravity Probe B (GP-B) recently finished a year of gathering science data in Earth orbit. The results, which will take another year to analyze, should reveal the shape of space-time around Earth -- and, possibly, the vortex. Time and space, according...

2005-10-03 19:18:59

NASA -- Almost 90 years after Albert Einstein first postulated his general theory of relativity, scientists have finished collecting data to put it to a new, different kind of experimental test. NASA's Gravity Probe B satellite has been orbiting the Earth for more than 17 months. It used four ultra-precise gyroscopes to generate the data required for this unprecedented test. Fifty weeks worth of data has been downloaded from the spacecraft and relayed to computers in the Mission Operations...

2005-03-11 07:20:00

Penn State -- Black holes have a reputation for voraciously eating everything in their immediate neighborhood, but these large gravity wells also affect electromagnetic radiation and may hinder our ability to ever locate the center of the universe, according to an international research team. "Any attempt to discover what was happening a long time ago at the beginning of our universe must take into account what gravitationally assisted negative refraction does to the radiation being viewed,"...

2004-11-27 08:00:00

A key prediction of Albert Einstein's general theory of relativity has been confirmed by an experiment showing that the Earth's rotation drags the surrounding fabric of space-time along with it. The phenomenon, known as frame-dragging, was one of the last untested predictions of general relativity. A NASA satellite, Gravity Probe B, was launched this year to test the same effect. "Frame-dragging is like what happens if a bowling ball spins in a thick fluid, such as molasses," said Errico C....

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