Real Science Radio: Now, Every (Comet) Scientist Works for Walt Brown!

Stripe

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Stripe

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gcthomas

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Has asteroid water been tested the way comet water has been tested?

No point - they have stayed too near the Sun for 4 billion years, so they don't have much water left. They may well have had a lot of water when the Earth was being formed, but not now.
 

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The solid, core structure of a comet is known as the nucleus. Cometary nuclei are composed of an amalgamation of rock, dust, water ice, and frozen gases such as carbon dioxide, carbon monoxide, methane, and ammonia.[12] As such, they are popularly described as "dirty snowballs" after Fred Whipple's model. However, some comets may have a higher dust content, leading them to be called "icy dirtballs"

Anyone who is interested can now take a closer look at that:

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Pause as desired for a detailed look.
 

gcthomas

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Only if you do not want accuracy.

Quite. There are no mathematical models detailing how he works out the orbits that can be reached from that singular event, and how their orbits are changed to their current parameters. There is no explanation how the very long period comets could have come back quite so quickly, or whether when the first hyperbolic comet is discovered that will be a valid disproof on top of its failure to accurately predict anything about the solar system.

It a woolly,post hoc and vague justification of his odd biblical fundamentalist literalism. I suspect even Brown himself doesn't really think it is a good model, but it is all he has.
 

The Barbarian

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There is no explanation how the very long period comets could have come back quite so quickly

That's the killer for Walt's story. How do we see a comet with a period of millions of years, returning in a solar system only a few thousand years old?

And yes, Kepler's laws rule out any shorter period for them.
 

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That's the killer for Walt's story. How do we see a comet with a period of millions of years, returning in a solar system only a few thousand years old?

Easy: The fountains of the great deep exploded with such force that the debris ejected into outer space reached superluminal speeds. Their speed was subsequently reduced by the drag created from the freezing of the water into ice crystals. Don't you know anything about the second law of thermodynamics?
 
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