Cosmic magnifying glass

The distant galaxy is visible through a cluster of thousands of galaxies called Abell 383, which has such a strong gravitational pull that the light that the galaxies behind it emit is deflected and focused. The phenomenon is called gravitational lensing and acts like a magnifying glass. This galaxy cluster strongly amplifies the light and makes it possible to observe the galaxy, which would otherwise have been too faint to see.

Credit: NASA, ESA and L. Calcada
Narration: Darach Watson