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The Faint Young Sun Paradox

AV1611VET

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Nah. I'm not concerned about the potentiality of alien life elsewhere in the universe. To my mind, it's nearly a non-issue and I only focus on the life we know is here on our own Earth, whether Bios, Psuche or Zoe.

Sounds good.
 
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RileyG

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From AI Overview:

The Faint Young Sun Paradox is a climatological and astrophysical contradiction: stellar physics dictates the early Sun was roughly 30% dimmer during Earth’s first two billion years, which should have frozen the planet solid, yet the geological record shows early Earth had liquid water and supported life.

Thoughts?
Stars change over time? (The Sun IS INDEED a Star). They age, get older, an eventually die.

The sun won't be around forever.

That's my very basic understating.

Even the universe itself will experience a heat death.

Peace
 
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RileyG

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Nah. I'm not concerned about the potentiality of alien life elsewhere in the universe. To my mind, it's nearly a non-issue and I only focus on the life we know is here on our own Earth, whether Bios, Psuche or Zoe.
Zoe? As in eternal life?
 
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AV1611VET

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Stars change over time? (The Sun IS INDEED a Star). They age, get older, an eventually die.

But that's the point though.

Life on earth couldn't have come about as cosmic evolution says it did, since the sun is a key ingredient in shaping the earth's biosphere.
 
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Gene2memE

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Life on earth couldn't have come about as cosmic evolution says it did, since the sun is a key ingredient in shaping the earth's biosphere.

How does "cosmic evolution" say life originated? If anyone has published a firm solution to abiotic chemistry, it seems to have gone unnoticed.

Also, the conclusion doesn't follow the premise.

The sun is indeed a "key ingredient in shaping the earth's biosphere". But, what about its lower luminosity/irradiance prevents life emerging on earth? Just because it would be inhibitory to life as it is now, doesn't mean it would be inhibitory to life as it was then.
 
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