Comets are supposedly diverted from the reservoir by the influence of passing stars.
The question is whether or not enough comets will be supplied by this mechanism to agree with observations.
I've discussed some of this in the newsgroup, but here I'll leave it for the rebuttal phase of the debate.
It contains Bob Bales's opening statement, Chris Stassen's rebuttal, and Bob Bales's closing remarks.
By my implication, this indicates that whether the old solar system theory adequately explains observations is also unknown. Presence of small particles in the solar system This is an astronomical observation consistent with a young solar system but which, as in the case of comets, requires extra assumptions if the solar system is old.
Because of the forward motion of an object in orbit around the sun, the sun's radition strikes it at an angle and exerts a backwards force. In the case particles on the order of 1 mm or less in diameter, this force degrades the orbit, causing the particle to fall into the sun within thousands to a few million years.
The supporting details are based on study, briefer than I would like, done for this debate.
Contrary to what is said about me on the net, I do understand the scientific method and can follow and evaluate the arguments.
I do not claim to be an expert in the fields involved. Short-period comets Short period comets disinagrate rather quickly due to interaction with the sun while in the inner portion of the solar system.