Who the heck is Hovind?<quoted text>
Don't listen to idiots like that jailbird Hovind. Comets come from the Kuiper belt and the Oort Cloud. Short lived comets come from the Kuiper Belt and long lived ones tend to come from the Oort Cloud.
The existence of these have been theoretical for quite a while the Kuiper Belt since the 1940's. But telescope technology was not high enough until the 1990's for us to spot any objects in it. Since then over 1,000 Kuiper Belt objects have been observed and it is estimated that there are over 100,000.
Now, did you know that the rotation of asteroids demonstrates that the Solar System is billions of years old?
And why would I "listen" to him anyway
I go where the evidence is, bud
Don't be a prat
The Oort Cloud, Kuiper Belt and Scattered Disc are HYPOTHETICAL
Nice bit of astrophysics, admittedly
But they fall into the realms of the usual evo-wishful thinking...
Kuiper belt: in order to work would need BILLIONS of comets
Hooray for your thousands...
Besides, they are TOO LARGE....over 100 km in diameter
Therefore, are at least TEN times wider than comets
Which means they are over a thousand times more massive!
Indeed, KBO's Orcus and Quaoar are over 1000 km in diameter.
Where Kuiper Belt failed as a potential reservoir for short distance comets, by virtue of its stability,
...enter stage R--> The Scattered Disc
--Levinson, H F and Donnes, L, "Comet populations and cometary Dynamics", in McFadden, L A A et al, Encyclopedia of the Solar system, 2nd Ed, Amsterdam, Boston,Academic Press, pp 575-588, 2007
Scattered disc objects are too few and too large eg SDO Eris is larger than Pluto, with a diameter of 2,400 km
Sedna SDO is larger than Quaoar
For long distance comets, with the Oort Cloud---> No observational support
--Sagan C and Druyan A, Comets, Michael Joseph, London, p 175, 1985
If there really was an Oort cloud, there should be 100 times more comets than we see...
So what do evolutionary astronomers do?
"Arbitrary fading function"....or that they are broken before we see them
--Bailey, M E, Where have all the comets gone? Science 296 (5576):2251-2253, June 2002
--Levison, H F et al, The mass disruption of Oort Cloud comets, Science, 296, 5576, 2212-2215, June 2002
See the fallacy?
Hypothetical source for comets
Not observable even today
Claimed to be billions of years old
Then make something up to explain why this hypothetical source does not provide the comets it should