First-Ever ‘Einstein Zig-Zag’ Found in Space Could Help Solve the Universe’s Expansion Mystery
A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy.
Astronomers discover two galaxies aligned in a way where their gravity acts as a compound lens
An international team of astronomers has discovered an instance of two galaxies aligned in a way where their gravity acts as ...