Come Pan STARRS K1 has been visible for over a year and is making a passage through the inner solar system that is reputed to involve an orbit 400,000 years long – see http://phys.org/print331286650.html. The dust tail and ion tail of the comet have been snapped in a succession of images (see link). The big question – is this 'the Special One' as a certain football manager might say.
Over at http://phys.org/print331546691.html … we have an image of comet Churyumov-Girasimenko in the process of spewing out dust and gases from its neck. Below.