Of the issues you raise as evidence of a young earth which I can speak to, you are preposetrous to claim that they stump scientists.
On Comets: The Solar System is surrounded by the Oort cloud, billions of ice chunks. The few we experience as comets are those which have been knocked out of their orbits, including by events as mundane as two ice chunks colliding. So, yes, comets are "new" in that those we presently see as comets will quickly wear out. But there will be billions and billions to replace them.
Your "evolution stoppers" are just the opposite; they cause rapid population change and explain why evolutionary bottlenecks help evolution occur in fits which are too quick to be observed over the geological record. the geological record discerns events which take place over millions of years, and simply could never be expected to reveal population changes which happen over mere thousands of years.
In fact, we do see intermediate stages of animal development in the fossil record, which have helped explain some previously inexplicable evolutionary steps. For instance, it has long been pointed out that a bird-reptile without feathers could not have adapted its forelimbs for flight. Sure enough, they have discovered non-flying brd-reptiles which appear to have feathers. Turns out that the same structure which makes feathers useful for flight also makes them extremely effective insulators, as anyone with down quilts knows. Feathers were an adaptation tor etain body heat. It just so happens that of the dozens of lineages of animals which attempted gliding (squirrels, lemurs, bats, pterosaurs, etc.), one prarticular group happened to have a feature (feathers) which aided its gliding ability. The feature was then refined to the point where true flight was acheived.
Which small, frozen bodies do you expect should be extinct of geological activities? Only Pluto would fit your definition, since the others (Io, etc.) are in orbit around high-gravity planets like Jupiter or are close enough to the sun to maintain geologic activity (Mercury, etc.).
For some of the other things you cite, I have no idea what yyou are tking about. What do you mean most geological layers doesn't have "erosion characteristics?"
The only one you cite which is actually a puzzle is that the moon (the only other solar body inert enough to collect dust which we have ever visited) does seem to lack sufficient dust.
There are an infinite number of things which have not been explained, or which don't meet our expectations. Every riddle solved by science will certainly pose dozens of others. The problem you face is that creationism doesn't solve any of the problems.
If the Earth is only 7000 years old, how did fossils become embedded in rocks thousands of feet underground? Why do the rocks with the lowest radioactive Iridium ratios lack fossils of higher organisms, even when lower organisms are abundant? How were metamorphic rocks formed so that they appear similar to sedimentary rocks, yet are chemically inconsistent with sedimentation? Why are the sea floors which are slowly spreading actually made of the rock created by slowly spreading sea floors, even though at their rate of spread, it would take tens or hundreds of millions of years? Why do we see a more primitive universe when we look away from the center of the universe? And yes, although geologic inversions do exist, why does radioactive iridium depletion correspond so well with local-relative depth, and in a manner so similar to radioactive carbon depletion?
The universe appears old, no way around it. The scientific community is not at all befuddled about that. Pointing to a creationists' web site which claims scientists are befuddled is no evidence that scientists are really befuddled.
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On Comets: The Solar System is surrounded by the Oort cloud, billions of ice chunks.
Even Carl Sagan admitted that there is absolutely no evidence of the Oort cloud ("Comets", 1985). According to Stern and Weissman (Nature #409) evolutionary theories pretend that comets are left over planetary material. Earlier studies ignored collisions between comet nuclei and overly estimated this alleged "cloud" to be about 40 earths, but when collisions are factored in, amount to about one - no where near enough to explain the comets.
The liar shamelessly continued with even more outrageous departures from reality:
Your "evolution stoppers" are just the opposite; they cause rapid population change and explain why evolutionary bottlenecks help evolution occur in fits which are too quick to be observed over the geological record.
This is the Rube Goldberg version of evolution. No matter how contradictory the evidence, one can, after following a path similar to Billy's path in Bill Keane's "Family Circus", actually make water dry, black become white, and up to be down. Evolution is based on the assumption that processes remain the same over billions of years. The liar here now is taking evidence for a young earth and is ignoring the very foundational premise of evolution in order to say something totally absurd.
Unspecified fantasies and delusions about reptiles with feathers as absolute proof of intermediate stages of evolution snipped as it comes from a source known for nothing but lies. (What does one refute when no details or even a name of this alleged critter are provided?) What is especially comical is that the liar suggests that cold-blooded reptiles need feathers for insulation like warm blooded critters do. Yet another flunk-out in basic biology.
For some of the other things you cite, I have no idea what yyou are tking about.
Translation: My crack pipe is recently missing and I can't possibly come up with another psychedelic explanation.
Then the liar, who can confidently explain how circles are squares wonders:
If the Earth is only 7000 years old, how did fossils become embedded in rocks thousands of feet underground?
A global flood? Mud deposits form from sediments, rapidly burying live critters. As the flood recedes and the land dries the compacted mud hardens into rock? Evolutionist prefer to think that a critter dies, falls down and the body lays unmolested for thousands if not tens of thousands of years waiting for dust particles to land on it and bury it. While this time elapses, no predators or bacteria dare touch this carcass like they do now. Amazing Fact! According to evolutionists, a critter dies and never rots or even enters into the food chain! It just hangs out for millions of years waiting to be convered with dirt several thousand feet thick. (Of course no mechanism for how this dirt gets there... pointless details, I know)
Then the liar, exhausted of any more emotional energy, just declares by fiat: "The universe appears old, no way around it."