Three Expedition 54 crew mates are in the final week of their mission and are packing up for a return to Earth. They and the rest of the crew also researched botany and biomedical science to support future crews on longer missions further into space.
Sometimes on a dark night near the poles, the sky pulses a diffuse glow of green, purple and red. Unlike the long, shimmering veils of typical auroral displays, these pulsating auroras are much dimmer and less common.
In an unprecedented deep survey for small, faint objects in the Orion Nebula, astronomers using NASA's Hubble Space Telescope have uncovered the largest known population of brown dwarfs sprinkled among newborn stars.