I notice you use the terms, "probably", "who knows", "just because", "as far as I am aware", "possibly",...
This is because were are speculating about things we are not experts on, but since you asked we will give it our best shot. Some things are facts, like the earliest dates for evidence of life on earth.
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All planetary rings still exhibit intricacies which Should Have long ago disappeared.
Why. have you any evidence that this is so?
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All known comets burn up their material with each pass around the sun and Should Have a maximum life expectancy of 100,000 years.
Perhaps new comets come in from outside our solar system. Why don't you investigate this, I'm sure there is a reason for this. It might have to do with comets coming from belts of debris that exist along way from the sun.
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The outer solar system planets should have long ago cooled off.
Cooled off to what?
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The spiral galaxies Should Have long ago unspiraled, and the uneven dispersion of matter in the universe Should Have long ago dispersed.
Have you any evidence as to why this should be so?
Scientists working from the preconception that the universe is 10-20 billion years old have suggested controversial and complicated possibilities for how these types of transient phenomena could still exist but their explanations are based more on faith, not science.
I think you'll find that is the wrong way round their explanations are based on evidence not on faith,.
You may not be very familiar with evidence coming from a tradition where faith is all, but in science it is generally assumed that we get the evidence first .
Note: I am pulling these questions from a Creation Science website.
You don't suprise me it had the air of a PRATT list ( Point Refuted A Thousand Times ) about it.
In that case the answesr to all your questions will be here:
http://www.talkorigins.org/indexcc/
in fact here is the refutation of your comets point:
Claim CE261:
Comets lose material as they near the sun. If the solar system were very old, comets would long ago have evaporated.
Source:
Velikovsky, Immanuel, 1955.
Earth in Upheaval. New York: Pocket Books, pp. 261-262.
Response:
- The comets that entered the inner solar system a very long time ago indeed have evaporated. However, new comets enter the inner solar system from time to time. The Oort Cloud and Kuiper Belt hold many comets deep in space, beyond the orbit of Neptune, where they do not evaporate. Occasionally, gravitational perturbations from other comets bump one of them into a highly elliptical orbit, which causes it to near the sun.
Links:
Matson, Dave E., 1994. How good are those young-earth arguments?
http://www.talkorigins.org/faqs/hovind/howgood-yea.html#proof3 Further Reading:
Jewitt, David, n.d. Kuiper Belt.
http://www.ifa.hawaii.edu/~jewitt/kb.html
Here is refutation of your unspiralling galaxies point:
Claim CE380:
Stars closer to the center of a spiral galaxy orbit the galaxy faster than stars farther away. Over many millions of years, the difference in orbital rates should wind the spiral tighter and tighter. We do not see any evidence for this in galaxies of different ages.
Source:
Corliss, William R., 1988. Why do spiral galaxies stay that way? or do they?
Science Frontiers Online 55 (Jan-Feb).
http://www.science-frontiers.com/sf055/sf055p07.htm
Response:
- Spiral arms are density waves, which, like sound in air, travel through the galaxy's disk, causing a piling-up of stars and gas at the crests of the waves. In some galaxies, the central bulge reflects the wave, giving rise to a giant standing spiral wave with a uniform rotation rate and a lifetime of about one or two billion years.
The causes of the density waves are still not known, but there are many possibilities. Tidal effects from a neighboring galaxy probably cause some of them.
The spiral pattern is energetically favorable. Spiral configurations develop spontaneously in computer simulations based on gravitational dynamics (Carlberg et al. 1999).
Links:
Carlberg, Ray, Debra M. Elmegreen, Bruce G. Elmegreen, Jerry Sellwood and William Lee Bell. 1999. Ask the experts: Astronomy: What process creates and maintains the beautiful spiral arms around spiral galaxies?
http://www.sciam.com/askexpert_question.cfm?articleID=0008A68A-8C7F-1C72-9EB7809EC588F2D7 References:
- Carlberg et al. 1999. (see above).
Here is the refutation to your outer planets are too cool point:
Claim CE231:
Jupiter and Saturn are cooling, giving off their internal heat at a rate too great for them to be billions of years old.
Source:
Brown, Walt. 1995.
In the Beginning: Compelling evidence for creation and the Flood. Phoenix, AZ: Center for Scientific Creation, p. 30.
Response:
- Jupiter is cooling slowly enough that it could still be radiating its primordial heat. Saturn's extra heat could come from gravitational potential energy as helium in its atmosphere condenses into droplets and falls toward the center.
Links:
Matson, Dave E. 1994. How good are those young-earth arguments?
http://www.talkorigins.org/faqs/hovind/howgood-yea.html#proof10
And here is the refutation of your point about saturn's rings:
Claim CE240:
Saturn's rings are unstable. They gradually drift outward, and disruption from bombardment could mean that they could not last more than 10,000 years. The rings cannot be billions of years old.
Source:
Ackerman, Paul D, 1986.
It's a Young World After All. Grand Rapids, Mich.: Baker Book House, p. 45. Cited in Hovind, Kent, n.d. Universe is not "billions of years" old.
http://www.drdino.com/QandA/index.j...n&varPage=UniverseIsNotBillionsofYearsOld.jsp
Brown, Walt, 1995.
In the Beginning: Compelling evidence for creation and the flood. Phoenix, AZ: Center for Scientific Creation, p. 29.
Response:
- Saturn's rings may be less than 100 million years old (Cuzzi and Estrada 1998). However, that says nothing about the age of the planet. The rings could have formed when Saturn captured a small moon that fell within the Roche limit (the distance below which moons will be pulled apart by tidal forces). This could have happened any time in Saturn's history.
- Saturn's moons shepherd the particles that make up the rings, preventing them from drifting and maintaining the gaps between the rings. This shepherding may allow the rings to be much older than 100 million years. (However, the color of the rings suggests not much more than 100 million years' worth of accumulated dust.)
Links:
Thompson, Tim, n.d. Answers in Genesis and Saturn's rings.
http://home.austarnet.com.au/stear/aig_and_saturn's_rings.htm
Matson, Dave E., 1994. How good are those young-earth arguments?
http://www.talkorigins.org/faqs/hovind/howgood-yea.html#proof9 References:
- Cuzzi, J. N. and P. R. Estrada, 1998. Compositional evolution of Saturn's rings due to meteoroid bombardment. Icarus 132(1): 1-35.
Further Reading:
Sobel, Dava, 1994. Secrets of the rings.
Discover 15 (Apr.): 86-91.
I hope all this helps you.
But you could have looked into these topics yourself.
I sugest you book mark the Talkorigins site and next time you come across a list of plausible creationist arguments, you check there to see if they have been refuted.