It seems the Solar System is having a visitation from a few comets?

Comet Pan STARRS:-

http://earthsky.org/space/comet-panstarrs-possibly-visible-to-eye-in-march-2013

Lemmon is going:-

http://astroblogger.blogspot.co.uk/2013/01/comet-c2012-lemmon-passes-through-heart.html

Comet ISON:-

http://www.spaceanswers.com/astronomy/2185/will-comet-ison-light-up-the-night-sky-in-late-2013/

Next year Comet Sliding Spring will either hit or just miss Mars:-

http://www.space.com/20079-mars-comet-impact-2014-flyby.html