The comet Siding Spring whizzed within 87,000 miles of Mars on Sunday -- close enough to the Red Planet that the fleet of spacecraft orbiting Mars "ducked" for cover.
CNN.com - Top Stories, CNN
Sun, 10/19/2014 - 4:54pm
The comet Siding Spring whizzed within 87,000 miles of Mars on Sunday -- close enough to the Red Planet that the fleet of spacecraft orbiting Mars "ducked" for cover.