Posted 22/03/2012 by eyeonicr in
Daily (pseudo)Science Updates. Tagged:
ICR,
Astronomy,
Creationism,
Science,
Skeptic,
Brian Thomas,
Skepticism,
Global Flood,
Faint young sun paradox.
The Faint Young Sun Paradox:
If our Sun is, as we believe, a perfectly normal 4.5 billion-year-old main sequence star, we would expect that, say 3 billion years ago it would be largely the same as another main sequence star of that age. And, 3 billion years ago, we would thus expect that the sun would output around 70% of the energy it does today. Unfortunately, this is too little to sustain liquid water on the surface of the Earth. And yet, we know that there was.
This, then, is the
faint young Sun paradox.
As you can probably guess, this has the creationists jumping for joy. Never mind our very ability to predict this kind of thing being a testament to our models of stellar evolution. Hence, the DpSU for Wednesday:
Can Solar ‘Belch’ Theory Solve Sun Paradox?
The notion that the earth and cosmos are billions of years old continues to present serious problems for evolutionary scientists. For instance, billions of years ago, the sun would only have glowed faintly, leaving nearby earth totally frozen. But with no liquid water on earth’s surface, how could life have evolved and become fossilized so long ago?
This conundrum has been called the “faint young sun paradox,” and after 25 years of research, it remains just as problematic as ever. Scientists have tinkered with models of what they thought were atmospheres that might have kept earth warm. But sunlight would have prevented an ammonia-caused greenhouse earth, and earth’s oldest rocks show that the atmosphere was not dominated by the mild greenhouse gas carbon dioxide either.
There are, it should be pointed out,
other greenhouse gases. And the people who came determined that “earth’s oldest rocks show that the atmosphere was not dominated by the mild greenhouse gas carbon dioxide” – you’ll note that Mr Thomas forgot to add that they are ‘supposedly’ Earth’s oldest rocks – came up with
their own solution to the paradox. And their results were
disputed – I’m not sure of the outcome.
Since researchers have found no solutions to the faint young sun paradox through planetary geophysics, some now look to reconfigure the sun’s evolutionary history. A team of researchers funded by the NASA astrobiology program plans to test new models of a sun that may have been large enough and that also existed early enough to have heated the earth billions of years ago.
Penn State University’s Steinn Sigurdsson will lead the team using a powerful computer program to model the early sun. He told Astrobiology Magazine that “to provide enough planet warming without overstepping any solar constraints, the Sun had to lose the extra mass in roughly the first few hundred million years.…That implies a solar wind that is about 1,000 times faster than what we currently observe.” Sigurdsson and his team plan to look for “stretch marks” left by such a tremendous break in solar wind.
A testable hypothesis! The link is
here.
In order to make the solar physics work out correctly, the team needed to invent a way for the sun to discharge incredible amounts of its own mass within a narrow time range. Otherwise, the question of why the early sun might have been too faint for life on earth would be replaced by the equally vexing question of why today’s sun does not scorch the earth.
Or, possibly, they could try a different mechanism to solve the paradox.
Of course, even if the researchers cobble together ancient events that fit with physics, that does not mean that the events actually happened.
I need to remember this quote next time Flood Geology comes up: it shall be my new “When do the
differences enter the conversation?”
I mean
seriously, pretty much every model that tries to resolve this paradox has better support than the
weird ideas the creationists come up with to explain away the impossibility of their Flood. Indeed, judging by their standards of evidence they would
all be correct, which would ironically itself present a paradox.
For example, if a mega solar “belch” could have enabled the early sun to heat up earth enough for ancient life to survive, that would still not solve the problem. It would merely change the question from “How could a young sun not have been so faint?” to “What could have forced a young sun to eject so much material so quickly?”
Hey,
science! That’s how it
works, Brian: each ‘answer’ raises more and more questions. Scientists have had centuries to come up with a way to keep themselves permanently gainfully employed: you must admit that they pulled it off.
But the biblical model of a young world suffers none of these conundrums. The faint young sun paradox remains unsolved for those who insist on a long-ages cosmology. And its solution, despite upgrades in scientific software, promises to evade the naturalistic view.
The idea that the earth and sun were both created during the creation week thousands of years ago, with the sun immediately able to provide life-supporting light as Genesis records, is perfectly consistent with scientific observations.
Er, no – again, creationists are
always making up these borderline-possible (if at all) models with no evidence better than “you can’t say it’s impossible – at least, not in the time it’ll take for me to
change the subject.”
So,
tu quoque Brian. But there seems to be no good reason why science can’t eventually agree on the correct solution: perhaps, if they were all true to a degree, you wouldn’t need such high levels of greenhouse gasses; the solar wind wouldn’t have to have been as strong
etc. But the creationists? Well, if it comes down to it, I need to ask the ICR some day which model of the Flood they support: as it stands B.T. is just jumping between those that suit him at a given moment.
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Daily (pseudo)Science Updates Tagged:
Astronomy,
Brian Thomas,
Creationism,
Faint young sun paradox,
Global Flood,
ICR,
Science,
Skeptic,
Skepticism 
.JPG "The Sun, through a telescope (a bad idea, but somebody managed it...)")