"Years ago at the South Pole, I looked up to the aurora for inspiration through the 6-month winter night." Aboard the International Space Station, NASA astronaut Christina Koch snapped this image of an aurora.
NASA astronaut Serena Auñón-Chancellor is hugged by students after a presentation about her experience on Expeditions 56 and 57 onboard the International Space Station at Excel Academy Public Charter School in DC.
NGC 7773 is a beautiful example of a barred spiral galaxy. A luminous bar-shaped structure cuts prominently through the galaxy's bright core, extending to the inner boundary of NGC 7773's sweeping, pinwheel-like spiral arms. Astronomers think that these bar structures emerge later in the lifetime of a galaxy.