[SunkenCiv]

Diagram showing the position of the Oort Cloud. CREDIT: Southwest Research Institute

[U-238]

There are other things orbiting between the stars like stars,rogue planets,moons and comets.

[U-238]

There also could be rouge black holes. These are the real difficult celestial bodies to detect.

http://www.dailygalaxy.com/my_weblog/2011/04/cosmic-danger-zone-rogue-solar-system-devouring-mini-black-holes.html

[GraceG]

How soon before Obama sends out a message using the Aricebo Dish to Apologize for stealing comets from other star systems?

Obama: “The Sun acted stupidly in taking the comets that belonged to the Romulan Star System 1.654 billion years ago....”

[blueunicorn6]

My Uncle Art had a Comet. It was black with an automatic transmission. I always wondered where that car went. Thieving sun.....could’ve stole Uncle Bill’s Thunderbird.....that thing was a lemon.

[this_ol_patriot]

Many Solar System Comets May Be Sun's Stolen Goods.

Billions of lawyers from out of the Tort cloud descend on the sun.

[JoeProBono]

[ml/nj]

small chunks of rock and ice

So where did all the Oxygen necessary to form the rock (presumably SiO₂, but maybe other mysterious stuff too?) and ice come from?

ML/NJ

[BenLurkin]

I understand that the comets themselves in the cloud are probably very far apart, but still...a “shell” of comets surrounding star systems would seem to add a nasty complication for would-be interstellar space-farers.