Why is Earth the only inhabitable planet of the solar system?

blogadmin - Monday, 13 December 2010 05:06

Question by Keshav D: Why is Earth the only inhabitable planet of the solar system?
What event/condition made Planet Earth the only inhabitable one? Is it because of its distance from the sun? Why do all the other planets in the solar system have totally different and uninhabitable atmosphere/ environment than that of Earth?

Best answer:

Answer by guenthercorp
Its the distance from the sun that allows it to have a decent temperature and its also the mass of the earth that allows the atmosphere from floating off into space.

Micoscopic plants are also to credit from converting the massive amounts of Carbon Dioxide into limestone so the air is breathable and able to sustain life.

Know better? Leave your own answer in the comments!

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  1. CommentsChemist of Carnage   |  Monday, 13 December 2010 at 5:35 am

    The reasons why WE can inhabit the Earth is primarily related to our distance from the sun. We are in a position where water is predominately liquid, allowing for life to develop in the oceans. Also, our planet has enough mass to hold an atmosphere (Mars or Mercury) and a low enough pressure and heat to not instantly cook life(Venus).

    Keep in mind that just because we haven’t found any other life in the solar system doesn’t mean it isn’t their. It just means we haven’t found it yet… or that we really are alone.

    Keep in mind that we are suited for the environment of the Earth, not the Earth to our needs.

  2. CommentsUjwal   |  Monday, 13 December 2010 at 6:13 am

    yes earth is the unique planet due to thee following reasons:-
    1. distance from the sun.
    2. due to the gases present in it which are held by gravitational force.
    These are the basic reasons means basis of all the other reasons.

  3. CommentsRichard R   |  Monday, 13 December 2010 at 6:57 am

    It is located in the suns habitable zone where water can exist as a liquid. It is of a certain mass that is capable of holding an atmosphere, but not too much atmosphere. Both Venus and Mars are in the habitable zone (barely), but issues of temperature, mass and atmosphere have rendered them lifeless. And while it sounds strange, the reason earth is habitable is because it developed life. Life changed the deadly conditions on early earth to the condition we now enjoy.

  4. Commentsrosie recipe   |  Monday, 13 December 2010 at 7:39 am

    A bit like Baby Bear’s porridge, it is the only one that is “just right” for life….neither too hot, nor too cold

  5. CommentsOaksey   |  Monday, 13 December 2010 at 7:50 am

    There is a problem with your question. Earth is not the only possibly habitable satellite or planet in the solar system. The problem is that we term habitability based on our needs. What we require to survive is only found here on earth. That is not to say that life could not evolve in climates different to ours that would not support us. For example I present to you as an option Titan, a moon of Saturn, that is found to have tholins both in the atmosphere and on the surface and they are projected to even be present into the crust of the planet where heat from the core could create a habitable zone not unlike primordial earth where life developed. We know that both Saturn and Jupiter create enough heat to adjust the temperature levels of their moons. There is also the planetoid Ceres that inhabits the asteroid belt where liquid water has has been recorded on the surface. The issue is that we need to stop thinking of extra terrestrial life in terms of our own requirements for life and to abandon the total constraints associated with the rare earth theory and accept the fact that we evolved according to our surroundings and that our surroundings did not evolve around us. There is also speculation that if geological death had not occurred on Mars then it may support life now, but with that comes the chance that it may have supported life previously. We just do not have enough information at this time to say we are alone as the only life in the solar system but lack of proof of it existing in our hands does not make it so. The argument stands to also say that because you cannot prove it doesn’t exist does not make it so. It’s a crap shoot until you answer it definitively with proof one way or the other.

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