Mars' Once-in-a-Million-Years Comet Flyby -- "Thousands of Shooting Stars Per Hour"

"They call this comet encounter a once-in-a-lifetime event, but it's more like once-in-a-million years," said Nick Schneider, a LASP research associate and lead IUVS scientist for the MAVEN mission. "MAVEN got there just in time, and we were ready. The...