SYLRC (Support Your Local Rocket Company) Seriously though, there’s a lot of new ones coming online and/or developing: Stoke, Astra, Relativity, Rocket Lab, etc… Yeah, it sucks that two of the behemoths are ran by egomaniacal sociopaths, but some of the other ones are bringing some cool tech and innovation to the table, and even getting government contracts.
The gas Giants are huge, like really really huge. Jupiter and Saturn have more than that. The rings from Saturn are probably from moons, but not necessarily colliding, but getting close enough to the planet to reach the Roche Limit.