NASA mission scientists raise concerns that ongoing prolonged Martian dust storms could disable the Mars Exploration Rovers.
- AP via the Washington Post
- NASA successfully launches its MAVEN space probe on a mission to study Mars' atmosphere.
- NASA announces that methane in Mars' atmosphere "could be produced either by geological activity or by life."
- Results of the Juno mission are announced by NASA researchers, revealing new and unexpected information concerning Jupiter's poles, meteorology, and magnetic and gravitational fields.
- Peggy Whitson, commander of the International Space Station (ISS), breaks the record for most total days spent in space by any NASA astronaut, at more than 534 days.
- NASA announces Saturn's moon Enceladus has the conditions in its global subsurface ocean to support life.
- U.S. Congress passes a bill that mandates NASA send humans to Mars by 2033.
- NASA astronaut Shane Kimbrough and ESA astronaut Thomas Pesquet take a spacewalk outside of the International Space Station to prepare the vessel for new arrivals.
- NASA and the European Southern Observatory announce the discovery of four new Earth-like planets in the Goldilocks zone of the star TRAPPIST-1, in addition to the three discovered there last year.
- Global temperatures rose to the hottest level on record for 2016 for a third successive record according to NASA and the US National Oceanic and Atmospheric Administration.
- NASA announces the return of the final piece of data collected during "New Horizons"' flyby of Pluto in July 2015. The data, taking about five hours at light speed to travel across 5.5 billion kilometers (3.4 billion miles), arrived at the Johns Hopkins Applied Physics Laboratory on the morning of October 25.