Sometimes, things across the vast Universe line up just right for us. The Einstein Ring above, like all Einstein Rings, has three parts. In the foreground is a distant massive object like a galaxy or galaxy cluster. In the background, at an even greater distance away, is a star or another galaxy.
We’re the observers, the third part, and all three must be perfectly aligned for an Einstein Ring to appear.
Continue reading “The Euclid Space Telescope Captures a Rare, Stunning Einstein Ring”