Dangerous Moons

[ThinkerX]

Earth might have gotten lucky.

I am reminded of Neptune/Triton in our Solar System.


https://www.livescience.com/unstable-mo ... SmartBrief

The moon crashing into Earth may sound like an unrealistic doomsday scenario or the stuff of sci-fi disasters. But for some planets in other star systems, such catastrophic collisions may be common.

New research published in the journal Monthly Notices of the Royal Astronomical Society(opens in new tab) uses computer simulations to show that collisions between exoplanets and their moons (called exomoons) may actually be a regular occurrence, which could be disastrous for any budding alien life on those planets.

[Lady Fraktor]

I was just watching a program that discussed this along with how theory now thinks Mercury was past Mars orbit originally but lost most of its crust/ mantle and was pushed inwards by a collision.