The Dark Twin

In the year 1604, during the month of August, a Supernova exploded, almost in Earth's backyard. Little did the people of Earth know that the explosion tore thousands of worlds apart and slung them through the deep cold regions of space. Traveling at 6000 miles per second one large asteroid from this explosion reached our Solar System four hundred years later. The human race is now fighting for its very survival with everything it has. But will it be enough to stop this monster from exterminating all traces of human life on planet Earth?