most precise test of gravity tagged posts

The gravitational lens from LRG 3-757 galaxy taken with the Hubble Space Telescope’s Wide Field Camera 3. Credit: ESA/Hubble & NASA

An international team of astronomers have made the most precise test of gravity outside our own solar system. By combining data taken with NASA’s Hubble Space Telescope and the European Southern Observatory’s Very Large Telescope, they show that gravity in this galaxy behaves as predicted by Albert Einstein’s general theory of relativity, confirming the theory’s validity on galactic scales.

In 1915 Albert Einstein proposed his general theory of relativity (GR) to explain how gravity works. Since then GR has passed a series of high precision tests within the solar system, but there have been no precise tests of GR on large astronomical scales...