The appearance of small bodies in the outer solar system could be deceiving. Asteroids and dwarf planets may be camouflaged with an outer layer of material that actually comes from somewhere else.
Like cosmic lighthouses sweeping the universe with bursts of energy, pulsars have fascinated and baffled astronomers since they were first discovered 50 years ago.
What would it be like to actually land on Pluto? This movie was made from more than 100 images taken by NASA's New Horizons spacecraft over six weeks of approach and close flyby in the summer of 2015.
NASA and the National Oceanic and Atmospheric Administration (NOAA) announced on Jan. 18, that global surface temperatures in 2016 were the warmest since modern record keeping began in 1880.
NASA's Space to Ground is your weekly update on what's happening aboard the International Space Station.
Thomas Pesquet: So cool to watch these micro satellites fly in formation above Earth on Tuesday. Peggy took fantastic shots, and Shane some great videos.
