Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Mass, magnetosphere, and life

  1. Aug 17, 2009 #1
    If one surveys stars, and their planetary systems, of 4.5 - 5 Byrs old; and then detects terrestrial exoplanet of say 1.5 earth masses, then one probably still has a magnetosphere - if we are typical (Copernian Principle). And if in habitat zone, then also look for oxygen signature in atmosphere, from very far distance. So if photosynthesis for such a long time of 5 Byrs (stromatalites 3.5 Byrs ago for us), then would there be some probability of a species developing culture? Then consider size of our galaxy of ~100-200 B stars, and any large number fall outs.
     
  2. jcsd
  3. Aug 17, 2009 #2
    Hi there,

    I don't really get the idea behind your question.

    Trying to find a planet that can hold life is one of the reason behind surveys of exoplanets.

    If you are asking about the probability of finding one, just in our Galaxy, I would say that chances are quite important. And if we are the "only" ones in our Galaxy, chances are finding some inother galaxies are very close to one.

    Cheers
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Mass, magnetosphere, and life
  1. Earth life (Replies: 19)

  2. Plate Tectonics and Life (Replies: 11)

Loading...