Although we are still yet to believe the Einstein’s theory of relativity completely, it has achieved a magnificent reward outside our solar system.
Yes! Einstein’s theory of relativity proves to be a success to illustrate the working of gravity outside our solar system. This is for the first time ever that the Einstein’s general theory of relativity has undergone such massive testing at a significant level.
Einstein’s proposed the general theory of relativity in the year 1915. The Einstein’s general theory of relativity is also known as GR. However, the implications of Einstein’s general theory of relativity are huge. Until now, these implications have never been tested earlier.
In place of this, scientists still rely heavily on the concept of Einstein’s theory of relativity in explaining the strange behaviour of our universe. Let us say for example, that the scientists are aware of the expansion of the universe since the year 1929. However, it was in the year 1998, that the universe started expanding at a higher pace in comparison to the earlier expansion process. According to scientists, the universal expansion is possible only if the universe possesses a mysterious substance. This mysterious substance is called dark energy.
However, our understandings about the universal expansions rely mostly on GR. If GR holds true, then we can say that the universe is experiencing a state of expansion. To vouch on this theory, astronomers intervened deeper into space. For intervening deeper into space, the astronomer’s team targeted a galaxy as a gravitational lens.
Thomas Collett says, “General Relativity predicts that massive objects deform space-time, this means that when light passes near another galaxy the light’s path is deflected. “If two galaxies are aligned along our line of sight this can give rise to a phenomenon, called strong gravitational lensing, where we see multiple images of the background galaxy. If we know the mass of the foreground galaxy, then the amount of separation between the multiple images tells us if General Relativity is the correct theory of gravity on galactic scales.” Thomas Collett hails from Thomas Collett of the Institute of Cosmology and Gravitation at the University of Portsmouth.