(Phys.org)—Newton's gravitational constant, G, has been measured about a dozen times over the last 40 years, but the results have varied by much more than would be expected due to random and systematic errors. Now scientists ...
(Phys.org) —Einstein's equivalence principle states that an object in gravitational free fall is physically equivalent to an object that is accelerating with the same amount of force in the absence of gravity. This principle ...
The gravitational constant G determines the strength of gravity—the force that makes apples fall to the ground or pulls the Earth in its orbit around the sun. It is part of Isaac Newton's law of universal gravitation, which ...
General Physics
Jul 11, 2022
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1009
A combination of astrophysical measurements has allowed researchers to put new constraints on the radius of a typical neutron star and provide a novel calculation of the Hubble constant that indicates the rate at which the ...
Astronomy
Dec 17, 2020
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2271
The universe is looking younger every day, it seems.
Astronomy
Sep 12, 2019
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2987
Astronomers using National Science Foundation (NSF) radio telescopes have demonstrated how a combination of gravitational-wave and radio observations, along with theoretical modeling, can turn the mergers of pairs of neutron ...
Astronomy
Jul 8, 2019
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A team of researchers affiliated with several institutions in China and one in Russia has devised two new ways to measure the gravitational constant. In their paper published in the journal Nature, the group describes the ...
It was an interesting week in physics as researchers delved into the question of why the measurements of the gravitational constant vary so much. The latest theory suggests that it is not likely attributable to systematic ...
(Phys.org) —A team of researchers in Europe has come up with a new way to determine the gravitational constant G. Rather than relying on using torque based techniques to measure gravitational pull, the researchers instead ...
(Phys.org) —Australian astronomers have combined all observations of supernovae ever made to determine that the strength of gravity has remained unchanged over the last nine billion years.
Astronomy
Mar 23, 2014
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