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An international team of scientists has once again proved – with a test in a triple star system – that Albert Einstein's theory of general relativity is valid both in space and on Earth.
According to this theory of universal gravity, in a given gravitational field, all objects, large and small, light and heavy, fall with the same acceleration regardless of the mbad or composition, be they feathers or for hammers, or for stars or black holes. Thus, according to Galileo, a small and large normobile who will fall from the tower of Pisa will reach the ground at the same time, as long as there will be no air there. What actually showed in 1971 on moon astronaut David Scott of the mission "Apollo 15", using a hammer and a feather that dropped and they arrived at the same time on the lunar surface.
The theory also applies to extreme gravity in space. The new research, conducted by Dr. An Arsbadt of the University of Amsterdam and the Astron Astronomy Institute Astron, published in the journal Nature, dispels any doubt about universal power – c & d That is universal – from Einstein's theory
. Used as an observation studio, the PSR J0337 + 1715, discovered in 2011, is 4,200 light-years from Earth and consists of two white dwarf stars and a neutron star. White dwarfs have a small size similar to the Earth, but a large mbad similar to the Sun. The neutron star (also known as pulsar) is even smaller and denser, remnant of a super-nova explosion, rotating like a powerful beacon, at an extremely constant rate (366 laps per minute), periodically sending electromagnetic signals
Astronomers have been observing this system for six years with three Westerbrok Synthesis telescopes, the United States (Green Bank) and Puerto Rico (Arecibo) radio telescopes, because they realized from the beginning early that he could use
The neutron star is walking around a white dwarf, while the second most distant white dwarf is walking around this pair of white dwarfs the first pulsar . In essence, the pair "gravitates" to the outer white dwarf. In addition, a member of the pair (neutron star) is much heavier than the second member (internal white dwarf), as an iron ball is heavier than a wing.
The researchers measured whether the inner white dwarf star and the neutrons, with their different weights, were influenced differently by the gravity of the outer white dwarf, ie, " falling "towards him at a different speed. Eventually, they found no difference, which means that Einstein's theory is valid, so no other theory is needed.
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