Mars orbiters, rovers poised for dramatic comet flyby
J Thoendell stashed this in Space
"We're going to observe an event that happens maybe once every million years," Jim Green, director of NASA's planetary science division, told reporters. "And this is where a comet coming from the farthest reaches of the sun's gravity will come to the inner part of our solar system. This comet will fly right in front of the planet Mars. Mars will be blanketed in cometary material."