An Einstein ring! What at first appears to be a single, strangely shaped galaxy is actually two galaxies that are separated by a large distance. Look at the image above. What do you see? An oval ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers with ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

(CNN) — Astronomers with the European Space Agency’s Euclid mission have captured an unprecedented look at a rare cosmic phenomenon — and they made the observations purely by happenstance. Einstein ...