Star orbiting massive black hole lends support to Einstein's theory of general relati


spaminator
#1
Star orbiting massive black hole lends support to Einstein's theory of general relativity
Reuters
Published:
July 26, 2019
Updated:
July 26, 2019 10:51 AM EDT
A star known as S0-2, the blue and green object in this artist's rendering, that made its closest approach to the supermassive black hole at the centre of the Milky Way in 2018 is shown in this U.S. National Science Foundation image released on July 25, 2019. Courtesy Nicolle R. Fuller/National Science Foundation / Handout via REUTERS
WASHINGTON ó Observations of light coming from a star zipping in orbit around the humongous black hole at the centre of our galaxy have provided fresh evidence backing Albert Einsteinís 1915 theory of general relativity, astronomers said on Thursday.
Researchers studied a star called S0-2, boasting a mass roughly 10 times larger than the sun, as it travels in an elliptical orbit lasting 16 years around the supermassive black hole called Sagittarius A* residing at the centre of the Milky Way 26,000 light years from Earth.
They found that the behaviour of the starís light as it escaped the extreme gravitational pull exerted by the black hole, with 4 million times the sunís mass, conformed to Einsteinís theoryís predictions. The famed theoretical physicist proposed the theory, considered one of the pillars of science, to explain the laws of gravity and their relation to other natural forces.
While Einsteinís theory held up in the observations of this star, astronomer Andrea Ghez of the University of California, Los Angeles said it may not be able to fully account for what happens in the most exotic possible gravitational environments like those of black holes. These extraordinarily dense celestial entities exert gravitational fields so strong that no matter or light can escape.
The study detected a co-mingling of space and time near the black hole as predicted by Einsteinís theory. Isaac Newtonís 17th century law of universal gravitation could not account for these observations, Ghez said.
ďNewton had the best description of gravity for a long time but it started to fray around the edges. And Einstein provided a more complete theory. Today we are seeing Einsteinís theories starting to fray around the edges,Ē said Ghez, who led the study published in the journal Science.
At some point a more comprehensive theory of gravity may be required, she said.
The study, relying heavily on data from the Keck Observatory in Hawaii, focused on an effect called gravitational redshift.
Einsteinís theory foresees the wavelength of electromagnetic radiation including light lengthening as it escapes the pull of gravity exerted by a massive celestial body, such as a black hole.
Photons, particles of light, expend energy to escape but always travel at the speed of light, meaning the energy loss occurs through a change of electromagnetic frequency rather than a slowing of velocity. This causes a shift to the red end of the electromagnetic spectrum, a gravitational redshift.

http://torontosun.com/technology/sta...ral-relativity
 
MHz
#2
The famed theoretical physicist proposed the theory, considered one of the pillars of science, to explain the laws of gravity and their relation to other natural forces.
While Einstein’s theory held up in the observations of this star, astronomer Andrea Ghez of the University of California, Los Angeles said it may not be able to fully account for what happens in the most exotic possible gravitational environments like those of black holes. These extraordinarily dense celestial entities exert gravitational fields so strong that no matter or light can escape.
The study detected a co-mingling of space and time near the black hole as predicted by Einstein’s theory. Isaac Newton’s 17th century law of universal gravitation could not account for these observations, Ghez said.


Is the actual law published or is it like the light bending experiment on 1900 that 'proved that theory' and has never been duplicated (a science must)
So it has limits and then a new set of parameters tales place? In a fractal universe could that ever happen? Of the size of the earth is governed by the volume of mass being dependent on total temperature. Since we are only 4B years old we have some stability in front of us and then the sun will roast us which increased out temp and that would be the greatest volume and then the sin goes out and space is the coldest it would ever get. Saying no mass was lost or gained our size changed as the temp changed, if we are part of a bigger entity then the universe itself changes volume as its whole temp changes, The temp changes as more stars are born than die, that us heating up so all stars should be obeying the same laws that allow embers to fly from a fire and not bump onto another ember. cold is when no new stars are born, a black hole is the universe with no active stars, it would have a smaller volume/same mass than it had when the most stars ever were 'hot'
 
MHz
#3
Looked up the law, it needs a star to be observed, the core is too bright for us to be able to see a single star circle the core. When on the far side gravity would do what to;

a) light than can be bent by gravity.

b) light than cannot be bent by gravity.
 
MHz
#4
NASA is an animation studio. Art and science are not the same