... A Backward Sunspot and the New Solar Cycle . ... It's the blue wisp near the bottom that's the remnant of a tremendous recent supernova explosion. ... Eight Planets and New Solar System Designations . ... The Matter of the Bullet Cluster . ... Ceres: Asteroid or Planet . ... Is Ceres an asteroid or a planet? Although a trivial designation to some, the recent suggestion by the Planet Definition Committee of the International Astronomical Union would have Ceres reclassified from asteroid to planet. ...