The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The International Astronomical Union officially recognized 128 new moons orbiting Saturn, bringing the new total up to 274 moons .

For centuries, Jupiter reigned as king of the moons. Initially, the Big Four, discovered by Galileo, and then as optics and astronomy advanced, more and more, smaller and smaller bodies, until Big J could proudly boast of 95 moons in its orbital thrall.

The discovery points to what astronomers have thought for decades, that Saturn's rings were caused by a massive collision about 100 million years ago.