This NASA/ESA Hubble Space Telescope image offers us the chance to see a distant galaxy now some 19.5 billion light-years ...

This Hubble Space Telescope image features a remote galaxy, which appears as a red arc that partially encircles a foreground ...

A distant galaxy, invisible for billions of years, has reappeared in a surprising form thanks to a rare cosmic illusion ...

In this scene, the nearer galaxy SDSS J020941.27+001558.4, is acting like a colossal magnifying glass in the sky. This allows ...

In order to explain this, in 1905, Einstein suggested in Annalen der Physik that light comprises quantized packets of energy, which came to be called photons. It led to the theory of the dual ...

Gravitational lenses are objects with significant enough gravitational fields that they bend light emanating from other sources in the universe. Gravitational lensing was proposed by Einstein as ...

The James Webb «Space Telescope» took a picture of a gravitational lens with a very unusual shape that creates the effect of an Einstein ring. The European Space Agency (ESA) has named this lens the ...