C/2012 S1, Comet ISON, began in the Oort cloud, almost a light year away and has traveled for over a million years.
On Thanksgiving Day, Nov. 28, 2013, Comet ISON will sling shot around the sun - but what happens next is a mystery. Either it will break up due to the intense heat and gravity of the sun or it will speed back away, destination unknown, but certainly never to return.