The Euclid space telescope brings the Einstein Ring into view. Check out the accidental discovery and what it looks like ...

Getting light to hit our retinas depends on different parts of the eye working together. First, the light goes through the ...

Euclid, the European Space Agency’s dark Universe detective, has made an astonishing discovery – right in our cosmic backyard ...

Lenses are usually made from glass or plastic ... It is refraction that makes some objects appear to bend when they are viewed through water, like the straw shown here. If the light hits the ...

These two defects are treated with spectacle lenses, which refract (bend) the light rays so that they do focus on the retina. Someone who is short-sighted can see near objects clearly, but cannot ...

The ring of light surrounding the centre of the galaxy NGC 6505, captured by ESA’s Euclid telescope, is a stunning example of an Einstein ring. NGC 6505 is acting as a gravitational lens, bending ...

This remarkable phenomenon was observed when a massive foreground galaxy cluster acted as a gravitational lens, bending and ...