NASA ready for date with rare Mars comet flyby Oct 19
World | Oct 10, 2014, 01:03 PM ISTWashington: NASA's extensive fleet of science assets, particularly those orbiting and roving Mars, are all set to to click and study a once-in-a-lifetime comet flyby Oct 19.Comet C/2013 A1, also known as comet Siding Spring,