The solar array cooling system for the Parker Solar Probe spacecraft — one element of which is the large, square black radiator visible at center, one of two that will be installed — is shown undergoing thermal testing at NASA Goddard Space Flight Center in Greenbelt, Maryland, in late February. Credit: NASA/JHUAPL

This comparison shows images of breast tissue taken by the open-top light-sheet microscope (left), traditional pathology techniques (middle) and frozen sectioning during surgery (right). The first two images reveal crisp details of cellular and nuclear features, while the frozen-section image is distorted due to the challenges of freezing fatty breast tissues. While the formalin-fixed paraffin-embedded section requires hours of preparation, the open-top light-sheet microscope image is captured in minutes. Credit: Glaser et al., Nature Biomedical Engineering

A rendering of how changes in an electron’s motion (bottom view) alter the scattering of light (top view), as measured in a new experiment that scattered more than 500 photons of light from a single electron. Previous experiments had managed to scatter no more than a few photons at a time. Credit: Extreme Light Laboratory|University of Nebraska-Lincoln

This is a composite image of Uranus by Voyager 2 and two different observations made by the Hubble Space Telescope — one for the ring and one for the auroras. Credit: ESA/Hubble & NASA, L. Lamy/Observatoire de Paris