A new camera can photograph from 45 kilometers away

These detectors are so sensitive they can pick up single photons and use them to piece together images of subjects up to 10 kilometers (six miles) away. Their technique uses single-photon detectors combined with a unique computational imaging algorithm that achieves super-high-resolution images by knitting together the sparsest of data points. The big advantage of this kind of active imaging is that the photons reflected from the subject return to the detector within a specific time window that depends on the distance.

Source: www.technologyreview.com