8 thoughts on “Three Habitable Planets? Maybe

  1. Jorge Zuluaga

    Dear Mark,

    In our recent paper (Jorge I. Zuluaga et al. 2013 ApJ 770 23, http://arxiv.org/abs/1304.2909) we used interior and thermal evolution models to constrain the magnetic properties of GJ667Cc and bet that even in the most optimistic case the planet is devoid of a substantial atmosphere to be habitable.

    Let’s see what should be expected for the other ones…

    Definetively "Not all that glitters is gold".

    Kind regards,

    Jorge Zuluaga
    Universidad de Antioquia
    Medellín – Colombia

  2. Mark Zastrow

    Hello Jorge,
    Thanks for commenting and providing the link to your work. Goes to show it’s a complicated question, and I look forward to seeing how M dwarf studies evolve in the coming years!

  3. Rod

    My answer to the why posed by Caltech astronomer John Johnson at the end of this very interesting report is simply Genesis 1:1.

  4. Bruce

    I concur completely Rod, and also point out Genesis 1:26-28 to explain why we inhabit this planet, and not the dark side of some tidally locked world tightly orbiting a red dwarf.

  5. Bruce

    This interesting story also demonstrates what looks like a shift in the meaning of the word habitable in this context. “Habitable” is now the attention grabbing buzzword in exoplanet reports. It seems that, in order to garner greater attention, the definition of habitable when it comes to exoplanets is being ever broadened. We inhabit the prime (and for now, unique) example of a habitable planet, one on which the average global temperature is a comfortable 15 degrees C. But now it seems that the HZ in these reports has been redefined to include practically any planetary situation wherein H20 might in any conceivable way exist in the liquid form. Many factors can constrain habitably however, such as the lack of a sufficient magnetic field which Jorge I. Zuluaga et al.’s paper discusses.

  6. pedro rezende

    What shall be happen when the astronomers discover alien life in a distant solar system? It will be too far for a better look and we will never know exactly what kind of life lives there.

  7. Bruce

    Pedro, that is an excellent question. At their great distances from us, any life bearing exoplanets would be quite unreachable at present. These distances would mean that life itself couldn’t be seen at all, but clues as to the possibility of life might conceivably be seen with the new telescopes in planning and under construction. Detection of a planet with an oxygen atmosphere in a star’s HZ would be hugely hyped as proof of life however. Evolutionist would no doubt celebrate such a discovery as “proof” of their explanation for life’s existence. In reality however, finding life beyond Earth would only prove that life on Earth is not unique. The question as to how life is formed would still be open.

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