Last month, physicists used this idea to build the world’s first entanglement-enhanced microscope that dramatically increases its resolution over purely classical instruments. They created entangled photons and used one to illuminate the object. The second photon can then give them information about the first that they use to increase the resolution of the resulting image.

via How To Build A Quantum Telescope — Medium.

Yes, there are problems, no it isn’t finished yet – but it’s a great idea!