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Thread: moonless worlds and habitability

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    not_Fritz_Argelander's Avatar
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    Default moonless worlds and habitability




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    Default Re: moonless worlds and habitability

    Interesting article, thanks! Makes me wonder where life, if found, will be found first. Not all planets have moons, but all moons have planets (excluding ateroid Gaspera & its moon Ida and the like). As we've seen from Jupiter and Saturn, these moons can be active in a lot of ways, from volcanic to possibly life-hosting. Seems there's more candidates for life in our own solar system on the various moons; I wonder if the conditions will generally be the same elsewhere?
    I know, I think too much

    Thanks again, n_F_A!

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    Default Re: moonless worlds and habitability

    Pretty fascinating not_Fritz. I guess one of the big questions is whether or not the presence of moons helps or hurts the chances of life.
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    Default Re: moonless worlds and habitability

    Quote Originally Posted by helicon64 View Post
    Pretty fascinating not_Fritz. I guess one of the big questions is whether or not the presence of moons helps or hurts the chances of life.
    In our case, it's thought that the creation of the Moon, was one of our best breaks....
    It caused the tides, and tidal pools, that many believe were the location of some of the first reactions that led to us....
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    Default Re: moonless worlds and habitability

    I guess there is no perfect world.

    Hateful Mother Nature says "if you want to live you must deal with an observing killing moon." Bah!!
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    Default Re: moonless worlds and habitability

    Quote Originally Posted by jimminCT View Post
    In our case, it's thought that the creation of the Moon, was one of our best breaks....
    It caused the tides, and tidal pools, that many believe were the location of some of the first reactions that led to us....
    I agree. I think tidal action is vital. So a planet needs a big moon for life, but a moon needs a planet...

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    Default Re: moonless worlds and habitability

    Thanks nFA, very interesting read.
    Always believed the moon was a major aid to life here. Wouldn't there be some of the moons benefits in a compact system?
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    Default Re: moonless worlds and habitability

    A few of the bennies we picked up from our encounter with Theia...
    A larger core. Vital for retaining our magnetic fields... (Mars wasn't so lucky....)
    Tidal action, (see above answer)
    An ~ 23.5° tilt, giving us our seasons
    The slowing and stabilizing of our spin, from somewhere around 6hrs/day to our present 24.

    Yeah, the Ol' Evil Orb sucks.... But I guess we'll keep her....
    References:
    https://en.wikipedia.org/wiki/Giant-impact_hypothesis


    **Edit**
    BTW, this has nothing to do with this thread, but the clearsky bar below, is a total BS lie.
    Not sure what dimension they're pulling data from, but I'd sure love some of it...
    Carry on!


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    Default Re: moonless worlds and habitability

    I sometimes wonder...

    Suppose Mars had a bit more mass - say 10-20% more. Suppose that enhanced mass let it latch onto a denser atmosphere. Mars went and captured two modest sized asteroids for moons - but a heftier Mars might have had a fair shot at latching onto something roughly Ceres sized for a moon. Had all that happened, Mars might not be quite the wasteland it is today. Not saying it would have been habitable, just nowhere near as unpleasant.

    And just because this didn't happen in our Solar System does not rule out it occurring elsewhere.

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    Default Re: moonless worlds and habitability

    Quote Originally Posted by not_Fritz_Argelander View Post
    I agree. I think tidal action is vital. So a planet needs a big moon for life, but a moon needs a planet...
    You really need to get out of my head. I was pondering exactly this earlier today I think life would still have been able to transition to land, the pulse would have just been different through wave action rather than the longer tide cycle. The actual tidal affect on early Earth is a lot harder to quantify. Some have suggest the monster tides of that era helped churn essential chemicals and compounds into environments life could take advantage off.

    As I have fallen back on so many times - I think we need to wait and see. Once we come up with an ideal theory for the origin of life we can see how affect the existence of the Moon had in that process
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