Could humans survive on other planets in the universe?
1 Answer
In my opinion : Yes .. But unfortunately we are not able to explore all the universe (limitations by actual technology).
Explanation:
At this moment, we didn't find another planet able to respect all the conditions for humans. This is a tricky problem.
Let's take our galaxy as example :
- First, you need to have a star similar to our sun, type G, and there are only 8% of the stars in our galaxy which this type !
N.B : if we assume that the Galaxy contains
- You have to be in the habitable zone of the galaxy (region of a galaxy in which life is most likely to develop taking several factors like major risks : supernova,...).
Let us further assume that
-
You need to have a planetary systems, but it seems the occurrence is quite common, so we can assume
#1/3# of these stars have planetary systems#-># 0.5 billion planetary systems in the habitable zone of the galaxy remain. -
The planet should be an Earth sized planet with a large satellite that stabilizes its rotational axis. If the percentage of G stars that have planetary systems and a planet of Earth size in its habitable zone is
#0.1%# , then there remain still#"500,000"# objects. -
You also need some big planets in the planet system , like Jupiter for us, to attract most of the asteroids. Moreover, of the
#"500,000"# objects, we can assume only#1/1000# contain a continuous habitable zone (no nearby supernova explosion, no catastrophic impacts,...)#-># still#500# objects remain. -
Then there is the factor of age . It took about
#3.5# billion years for life to develop to higher forms. How many of these#500# objects are old enough ?
If we take a crude value of
And this is with pessimistic estimation considering only G-stars, maybe we can extend with K-stars ...
Conclusion : It's not a large number but definitely different from one and only for our galaxy .. So I am pretty sure it's possible !
