In the section Image of the Week on the Hubble NASA / ESA Space Telescope website, an impressive image of GAL-CLUS-022058s, a galaxy in the constellation Fornax, is presented.
The photo captures one of the most complete and largest known Einstein rings in the universe. The image of the galaxy is distorted to a ring shape under the influence of a cluster of galaxies located closer to us.
The image shows us the effect of gravitational lensing. Einstein’s theory of relativity predicts that bodies deform the spacetime around them, leading to the decline of light rays.
It should be emphasized that this effect is visible only in very massive objects. In this case Einstein’s ring has a pronounced shape.
We add that the Hubble Orbital Telescope, which captured the structure of GAL-CLUS-022058s, was launched more than 30 years ago – in April 1990. During three decades of service, the observatory collected a colossal amount of scientific data, the meaning of which cannot be overestimated.