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Zinjanthropos
Post  Post subject: Redefine Goldilocks Zone?  |  Posted: Mon Dec 05, 2016 2:02 am
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Joined: Mon Aug 15, 2011 2:49 am
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Things I wonder about....

If life is found to exist on Titan when according to Wiki: all living things on Earth (including methanogens) use liquid water as a solvent, it is conceivable that life on Titan might instead use a liquid hydrocarbon, such as methane or ethane.

1. Then should the search for extraterrestrial life include the very cold planets/moons of distant star systems?

Also:
2. Would there be advantages to being a life form on Titan than one on Earth?
3. Seeing how the average temperature in space is cold enough to keep a hydrocarbon in liquid form then could it be that there is more of a likelihood of cold solvent life forms vs living bags of water within the universe?
4. Would liquid hydrocarbon life forms* be more likely to spread across the universe (panspermia) than liquid water life forms*?

*is there a term for such life forms?

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PhDemon
Post  Post subject: Re: Redefine Goldilocks Zone?  |  Posted: Mon Dec 05, 2016 7:16 am

Joined: Wed Jun 26, 2013 10:44 am
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Location: Newcastle-upon-Tyne

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Quote:
is there a term for such life forms?


I suggest olefints... I'll get my coat...

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marnixR
Post  Post subject: Re: Redefine Goldilocks Zone?  |  Posted: Mon Dec 05, 2016 8:06 am
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Joined: Thu Aug 04, 2011 8:35 pm
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Location: Cardiff, Wales

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I definitely would welcome a different type of life being found that's clearly different from earth's water-based life

for the time being our search for other life forms is in the unenviable position of having a sample size of 1 to work from, and something totally different would help our understanding of what life really is about

plus, the issue of contamination with earth-based bacteria is less likely to be an issue than, say, Mars or Europa

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