A new Einstein cross is discovered

A new Einstein cross is discovered

However, spotting four points of light in the shape of a cross positioned around a galaxy does not assure us that it is a lens, so we must show that the 4 images belong to the same object. The object acting as a lens turns out to be an elliptical galaxy located at a distance of approximately 7 billion light years (z = 0.556), while the source is at least 20 billion light years away (z = 3.03). Finally, as with a normal glass lens, the gravitational lens concentrates toward us the light from the source, making it possible to see intrinsically unreachable objects.

Source: phys.org