The next year, the "Sheffield" learns through its telepaths that the Sun has gone nova, killing everyone in the solar system. A wavefront of deadly gamma radiation is expanding at lightspeed, threatening the colonies that are all that is left of humanity. The crew is only able to warn one colony in time; the rest are doomed. The Sun going nova is contrary to all astrophysical theories, and because over 90% of the sun's mass was converted into energy, it is speculated that an alien species caused the disaster. Unable to bear the catastrophe, one of the relativists commits suicide. Despite the other three's efforts, the quantum ramjet drive soon shuts down. The "Sheffield" will not be able to stop; it will coast by its intended destination at 97.6% of the speed of light.