A serendipitous but revealing discovery The Einstein ring was spotted by chance during Euclid's initial tests. The first images, intentionally blurred, revealed an intriguing circular structure ...

Lenses are useful because they can allow us to learn about both given background galaxies, as well as about how the universe is expanding between us and them. Einstein rings may also allow us to ...

In order to form an Einstein ring, multiple factors have to come together: A massive galaxy in the foreground needs to be perfectly aligned with the background galaxy from the perspective of the ...

Its enormous gravity warps space-time and so the light of a background galaxy 4.42 billion light-years away is warped into a ring. “An Einstein ring is an example of strong gravitational lensing ...

Remarkably, this background galaxy had never been observed before and remains unnamed. “An Einstein ring is an example of strong gravitational lensing,” says lead author Conor O’Riordan of ...

While the Einstein ring is a striking example of strong gravitational lensing, Euclid’s main focus is on weak lensing, where the distortions of background galaxies are far subtler. By analyzing ...