Approximately 4.6 billion years ago a giant molecular cloud collapsed causing the creation of our solar system. Among the astronomical objects which consist our solar system are some planets which will soon or later collide with our planet killing us all. Destroy the dangerous planets (by clicking on them) starting from 0 to 99. If you are fast enough you will get more and more points! You have 60 seconds to destroy as much planets as you can. Every 20 seconds the planets will update their positions according to new scientific measurements , a shaking effect 5 seconds before indicates the upcoming change.