NASA Science Briefing: Comet Siding Spring at Mars

Research just published in Nature describes two bright, extremely high-altitude plumes observed on Mars by amateur astronomers in March and April 2012, but attempts at explaining the phenomena defy our current understanding of the Martian upper atmosphere.

NASA’s Mars rover Curiosity has begun the steep ascent of an iron-oxide-bearing ridge that’s grabbed scientists’ attention since before the car-sized rover’s 2012 landing.

After a final attempt to restore contact with the Opportunity Mars rover, NASA managers declared the spacecraft lost, bringing a 15-year mission to an end.