Notices
Results 1 to 3 of 3
Like Tree1Likes
  • 1 Post By river_rat

Thread: Gliese 667C

  1. #1 Gliese 667C 
    Moderator Moderator Cogito Ergo Sum's Avatar
    Join Date
    Jun 2013
    Location
    Belgium
    Posts
    2,519
    Up to now, astronomers have detected 4.157 exoplanets (of which 873 are confirmed, i.e. a confidence level of 99.9999%).
    On the list, the planets of Gliese 667C are mentioned.

    This triple-star system contains 5 planets (two other signals are not yet confirmed). Of the five planets, there are:
    "(...) three rocky planets in the star's habitable zone, where temperatures should suit life.(...) These three worlds are close enough to each other that any intelligent life there with the ability to build rockets could easily visit the neighbours."


    Of course, if the people are informed about these recent findings, then one can ask if there is life on those planets.
    In order to answer that question, scientists could (and will) scan the exoplanets for life.

    But my question is: how do you scan for life?
    And how do we know that we detect life if we only measure with the characteristics of terrestrial life in mind?
    (e.g. looking for amino acids, when it is possible that other life forms do not use them)


    Sources:
    PlanetQuest - The Search for Another Earth
    Three habitable worlds found around the same star - space - 25 June 2013 - New Scientist
    http://www.eso.org/public/archives/r...8/eso1328a.pdf


    Last edited by Cogito Ergo Sum; January 3rd, 2014 at 10:06 AM.
    "The only safe rule is to dispute only with those of your acquaintance of whom you know that they possess sufficient intelligence and self-respect not to advance absurdities; to appeal to reason and not to authority, and to listen to reason and yield to it; and, finally, to be willing to accept reason even from an opponent, and to be just enough to bear being proved to be in the wrong."

    ~ Arthur Schopenhauer, The Art of Being Right: 38 Ways to Win an Argument (1831), Stratagem XXXVIII.
    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Professor river_rat's Avatar
    Join Date
    Jun 2006
    Location
    South Africa
    Posts
    1,517
    Right now I don't think we can scan for life, at a bare minimum you would need to be able to do direct spectroscopy of the planet in question to pick up the tell-tail signs in the atmosphere. There were plans a while ago for an array of telescopes in space where one could use interferometry to resolve the exoplanets but I don't think it got very far beyond the planning stage.


    Lynx_Fox likes this.
    As is often the case with technical subjects we are presented with an unfortunate choice: an explanation that is accurate but incomprehensible, or comprehensible but wrong.
    Reply With Quote  
     

  4. #3  
    Forum Freshman AmazingUniverse's Avatar
    Join Date
    Jul 2013
    Posts
    8
    Here's a nice video that explains the Gliese 581 Planetary System

    Reply With Quote  
     

Similar Threads

  1. Gliese 581
    By Lynx_Fox in forum Astronomy & Cosmology
    Replies: 13
    Last Post: May 29th, 2009, 04:59 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •