A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy.

An international team of astronomers has discovered an instance of two galaxies aligned in a way where their gravity acts as ...

Two massive galaxies are bending light from the same distant quasar, creating a so-called Einstein zigzag lens that could ...

Not only that, but the second lens also magnifies the first – though not very bright, it can be seen in the images collected ...

Modern imaging systems, such as those used in smartphones, virtual reality (VR), and augmented reality (AR) devices, are ...