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Albert Einstein's Insights Into Gravity Hold (19659002) Einstein's understanding of gravity, as outlined in his general theory of relativity, predicts that all objects fall At the same rate, regardless of their mbad or composition.
This theory has pbaded the test of the world. (19659002) The new findings, published in the journal Nature show that Einstein's insights into gravity still hold sway, even in one of the most extreme scenario. [19659002TodateEinstein'sequationshavepbadedalltestsfromcarefullaboratorystudiestoobservationsofplanetsinoursolarsystem
However, alternatives to Einstein's general theory of relativity predict that compact objects with extremely strong gravity, like neutron stars, fall a little less than objects of lesser mbad.
That difference, these alternate theories predict, would be due to a compact object's so-called gravitational binding energy – the gravitational energy that holds it together.
Withstanding tests
In 2011, the National Science Foundation's (NSF) Green Bank Telescope (GBT) discovered a natural laboratory This theory contains a neutron star in a 1.6-day orbit with a white dwarf star in a 327-day orbit with another white dwarf
"This is a unique star system," said Ryan Lynch of the Green Bank Observatory in the US
"We do not know of any li ke it. That makes it a one-of-a-kind laboratory for putting Einstein's theories to the test, "he said.
Since its discovery, the triple system has been observed regularly by the GBT, the Westerbork Synthesis Radio Telescope in the Netherlands and the NSF's Arecibo Observatory in Puerto Rico.
If the alternatives to Einstein's picture of gravity were correct, then the neutron star and the inner white would dwarf each other.
"The inner white dwarf "said Scott Ransom, an astronomer with the National Radio Astronomy Observatory in the US.
Through meticulous observations and careful calculations, the researchers were able to test the system's gravity using the pulses of the neutron star alone.
They found that any acceleration difference between the neutron star and the inner dwarf is too small to detect. [1 9659002] "If there is a difference, it is not more than three parts in a million," said Nina Gusinskaia from the University of Amsterdam in the Netherlands.
The result is more accurate than the previous best test of gravity, making the evidence for Einstein 's Strong Equivalence Principle that much stronger, they said.
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