why Triton orbits in opposite direction? Why it is in a decaying ordit and will smash into Neptune soon.

origin of Pluto - was it a moon of Neptunes? and Charon too?

did a mysterous 5-earth mass object smash up all of Neptunes moons and fling half into intersteller space in the distant past?

interesting read:

http://www.bpccs.com/lcas/Articles/pluto.htm