Comet Siding Spring is about to fly historically close to Mars. The encounter could spark Martian auroras, a meteor shower, and other unpredictable effects. Whatever happens, NASA's fleet of Mars satellites will have a ringside seat.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2014/12aug_marscomet/
VIDEO: https://www.youtube.com/watch?v=2R4yj7DtQbM&feature=youtu.be
