Abstract
At some point in time, eons ago, there occurred one of the greatest explosions of all times. Never before, and never since, had there been anything equal to it. The explosion was fantastic in many respects: first of all because of its force, so great that it changed the entire universe; and secondly, because of its results. Out of the interstellar gas and dust there developed for all of us to see, today: the stars, the galaxies, the planets, the solar system, and even our own earth. Most wonderful of all, since that time these heavenly bodies have been evolving into ever higher levels of cosmic complexity, and have been whirling off into space and in orbits so precise that their comings and going can be used as clock calendars. These are, of course, all factual events reviewed so dramatically for us in 1981 by Carl Sagan over public television in a series called Cosmos.