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Thread: the provisionary of earth towards evolution

  1. #1 the provisionary of earth towards evolution 
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    the earth travels around the sun in an elliptical track (not strictly true because the sun moves in space as well)
    the moon travels around the earth
    the earth "wiggles"
    above provisionary provokes frequencies with wavelenghts described as a year, a month, the seasons
    the earth has a lot of water, this in solid, liquid and vapour form
    they together provide a system which allow evolution to happen (circulating systems, temperature stability)
    earth is required to stay in a comfort zone (not to close, not to far from the sun) and do so for at least the time required evolution took up until now
    earth provides for proof that iceages occured, earth magnetic flips occured, while those events likely had a dramatic effect on evolution, it seems, within reason, that evolution can coope with such events
    but how does the earth stay in the comfort zone for millons of years?
    a stable system, therefore a controlled loop?
    an ununstable system, but timeframe to big to observe the instability?
    any suggestions?


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    Genius Duck Moderator Dywyddyr's Avatar
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    https://en.wikipedia.org/wiki/Stabil...e_Solar_System


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    Thanks Dywyddyr, but that page is really about instability.

    In answer to the OP, I'll offer that a body's loss of volatiles (mass), or accretion thereof, helps to stabilize orbits. For Earth that volatile would be water. Bad metaphor: like a hot air balloon dropping sandbags to stay aloft. This is just a wild suggestion.

    No my suggestion may be nonsense: To illustrate imagine two astronauts holding hands in stable orbit around Earth. What happens when they let go, so they become two lesser masses? Same orbit(s).

    Anyway if the state of water on Earth (somehow) helps regulate our orbit, then because the state of water truly *is* regulated by life: Gaia Hypothesis +1.
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    Genius Duck Moderator Dywyddyr's Avatar
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    Quote Originally Posted by Pong View Post
    Thanks Dywyddyr, but that page is really about instability.
    Because that was the question:
    earth is required to stay in a comfort zone ...
    but how does the earth stay in the comfort zone for millons of years?
    a stable system, therefore a controlled loop?
    an ununstable system, but timeframe to big to observe the instability?
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  6. #5  
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    Quote Originally Posted by Pong View Post
    No my suggestion may be nonsense: To illustrate imagine two astronauts holding hands in stable orbit around Earth. What happens when they let go, so they become two lesser masses? Same orbit(s).
    the 2 astronauts have been subject to a rocket trajectory and velocity, if they let go each other and not provoke any reaction forces they stay together
    because 0 gravity doesn't exist (nor does vacuum eg an absence of atoms), they slowly fall back to earth
    for a planet orbit, it seems that our current understanding suggests that the gravity pull is the motor providing the velocity (?)
    Quote Originally Posted by Pong View Post
    Anyway if the state of water on Earth (somehow) helps regulate our orbit, then because the state of water truly *is* regulated by life: Gaia Hypothesis +1.
    consider opposite:life is regulated by water
    my gutfeeling is pushing my mind somehow towards some form of Gaya concept
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    Genius Duck Moderator Dywyddyr's Avatar
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    Quote Originally Posted by perdurat View Post
    for a planet orbit, it seems that our current understanding suggests that the gravity pull is the motor providing the velocity (?)
    That may be your "understanding" but it's not one subscribed to by science.
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