Re: It's a Holocaust!
end up slightly slower than the original planet, thus forming a tail
I am not convinced. The statistical process should make the debris faster and slower relative to the central mass with equal probability.
Also, remember the Gas Torus Mnemonic: "East takes you out, out takes you west, west takes you in, in takes you east, port and starboard bring you back"
If the debris slow down relative to the central mass, they will fall in and will overtake the planet.