Re: 17 evidence againts evolution

Shane wrote:

On 15 Feb 2006 15:22:12 -0800, unrestrained_hand@xxxxxxxxxxx wrote:


Shane wrote:

On 15 Feb 2006 13:26:41 -0500, Steve Schaffner wrote:


"Pavil Natanovich" <pasha582@xxxxxxxxx> writes:


At some point, some billion years from now, the inputs from outside
combined with the lesser genertion of radioactive energy from inside
will result in a planet more similar to Mars,

Rubbish.

You have an opinion on this?

Although the earth will not shed mass, as both internal and external
energy sources dwindle it WILL cool down. The stars will wink out, one
by one, and the universe grow dark and cold. Is that rubbish?

Not rubbish, just unlikely. The Earth will probably be vaporized when
the sun goes through a red giant phase,

My limited understanding of this phase, is that the mass of the sun
remains the same as it is now, but is spread through a huge volume, so
the average denity is extremely low, particularly 93 million miles
out. Consequently, the earth will be in a cloud of very thin, hot
vapour. I am not sure if this will be hot enough to vapourise the
earth.

All of the astronomers are of the opinion that it will be. I'll take
their word for it.


It seems that the agreement is not quite universal. Surface temps of a
red giant, (I incorrectly wrote 'dwarf' earlier) are below 6,500K, and
our suns current temperature is already below that, so possibly a
lower temperature still, will be encountered in the red giant stage;
some estimates are as low as 3,000K, so the amount of heat experienced
will be low given the low density, estimated at 0.1 kg/m3. Note that
this density only 1/12th that of our current atmosphere at sea level.

It seems to me the problem is not heat per se, but orbital decay. The
friction generated by going through that atmosphere will definitely kill
the earth's orbital velocity, and it might generate enough heat to melt
the planet too.

References vary as to how far out sun will expand, and whether or not
the earth will be engulfed.

If it is, bye bye.

before it collapses into a
white dwarf. The universe will grow cold and dark, but the Earth won't
be around.

It may be. If it does, however, humans are unlikely to survive the red
dwarf conditions in the exceedingly unlikely event that they survive
long enough to experience them.

We are talking about a billion years of so down the line. If we have
descendants even 10,000 years from now, I can't imagine that they would
let a little thing like a red giant wipe 'em out. They may have to
move, though...

You are talking of people who may not survive the effects of global
warming, something we have a certain measure of control over. On what
basis do you conclude we can deal with a red giant?

Who says we won't survive the effects of global warming? Nobody I know
is worried about that. There may be a total breakdown of civilization
resulting in a massive die-off of population, but the species is in no
danger. And as far as dealing with a red giant, I would suggest a
strategy of "Run away! Run away!"

.

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