8. Finding Livable Planets

    We live on the earth. Here is very livable. But when one day humans stand journey into space will come. Because the number of people on the plane is limited. Population on earth continues to grow fast now. Where will we live in? 

On Mars.

    The presence of stars with an environment similar to Earth's an interesting problem for scientists. Earth might be unusual star in the universe. This may be common star. The important thing is water. H2O, if present in the liquid, then there will be a sea there. Life may bring as Earth. Distance from the central star is also a important. If energy imparted to the planet is not appropriate, the planet can not be maintained for life. Scholars called habitable zone qualifying area that life is born. It is an index that is helpful to find a planet life exists. We found exoplanets of 1010 pieces now, but planet in this area is only 10. 

   There are not always life on the planet in that region. There are several other conditions. For example, it is substance that oxygen can not miss us. But the atmosphere of Mars and Venus do not contain too much oxygen. We are not able to live in there for now. It is not good for the distance is too far. It will be somewhere in the solar system if we are to migrate. Finding a planet meet all difficult. So there is also the idea of ​​trying to change the environment of the planet. If you bring in a plant to Mars, oxygen might increase. It will be a moon habitable if Building that is comfortable built. It is also possible that an organism that does not require the presence of oxygen. There may be no edge to us in that case. 

    There is also the idea of ​​creating a huge space colony, not the planet. We must create a gravity as opposed to a planet, and we must bring in resources. But have a lot of interesting proposal, everyone is because are longing to live in space. There is also a theory to create a gravity by centrifugal force, and separate day and night in a huge mirror, I am interested in this topic.  

  



    They are not talking about realistic, but still, space development period of the world are preparing for that. They make sure the conditions under which life exists in the universe. It is not funny when you discover the aliens in the process.

The sources:
http://en.wikipedia.org/wiki/Planetary_habitability
http://irorio.jp/sakiyama/20131025/83804/

The pictures:
http://upload.wikimedia.org/wikipedia/commons/thumb/9/94/Spacecolony3edit.jpeg/306px-Spacecolony3edit.jpeg
http://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Mars_Viking_11h016.png/220px-Mars_Viking_11h016.png