Interesting science news. A new comet has been spotted in the southern hemisphere. Its moving at 35km/s and heading towards Mars. It will come within 50,000km of the planet on 19th October 2014 and there is about a 1/600 chance that it might actually hit the planet.
If it did, 50km of rock and ice would crash into the surface (with little atmosphere to slow it down) and release about 20 billion megatons tnt of energy and create a 500km wide crater. The flash of the explosion would be visible from earth.
Even if it misses we're in for a show. There are 2 rovers and 2 orbiting space craft in place around mars ready to snap some pictures of the flyby. The comet itself should be visible using binoculars.
Incoming comet will probably miss Mars, says NASA ? The Register
C/2013 A1 - Wikipedia, the free encyclopedia
In October this year, to whet your appetite, the 'comet of the century' is due to narrowly miss the sun. If it doesn't break up beforehand, the comet will be brighter than the moon and might be visible during the day.
The comet of the century in 2013 | TIME.com