Habitable Exoplanets Catalogue ranks alien worlds on suitability for life

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Profile john3760

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Message 1256439 - Posted: 6 Jul 2012, 15:24:12 UTC - in response to Message 1250719.  

I assume by Earthlike, they just mean it has the same ( or similar ) mass,with a temperature
allowing liquid water to exist.
Beyond that nothing is certain.
The star which the "Earthlike planet" is orbiting may be so different from the sun
that life could not exist,or many other parameters could be so different from our own

Rocky planet,with the possibility of liquid water,about the same size as Earth,is the
best hope we have ,as we know life exists on a planet just like that. Ours !

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Profile William Rothamel

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Message 1256611 - Posted: 6 Jul 2012, 20:29:06 UTC - in response to Message 1256439.  
Last modified: 6 Jul 2012, 20:30:27 UTC

I'll bet that if we tried and were sufficiently knowledgeable, we would find about 2 dozen factors and their parameter ranges that are required for the emergence of intelligent life that we could communicate with. To start with they would have to be close to us.

I have listed several elsewhere that I feel are required. Can you all point to some of these and others. Temp range, stable orbit, circular orbit, moon to stabilize spin, Tides ?, water, land, Oxygen, outer gas giant to protect from asteroid and comet hits, magnetic field, ozone layer, several billion years old, main sequence star, non-binary star, etc
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Profile Michel448a
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Message 1258741 - Posted: 11 Jul 2012, 5:16:06 UTC

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Profile Bob DeWoody

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Message 1259168 - Posted: 11 Jul 2012, 23:46:07 UTC

Has anyone stopped to think that if we find a planet at long range that appears to be suitable for life such a planet probably has it's own biosphere complete with life and possibly even if no communication via radio or other electronic means, intelligent life?

If such a place is found my feeling is that they should be left to their own devices and not interfered with in any way. Maybe my feelings are strongly influenced by Star Trek's prime directive and the events depicted in the movie "Avatar" but that doesn't make them any less correct.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message boards : SETI@home Science : Habitable Exoplanets Catalogue ranks alien worlds on suitability for life

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