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Next stop Gliese 581g

  1. Sep 29, 2010 #1
    Amazing discovery. Carl Sagan would be thrilled to read this article. Gliese 581g is only 20 light-years away. It would make a nice weekend getaway spot.

    http://www.space.com/scienceastronomy/earth-like-exoplanet-possibly-habitable-100929.html

     
  2. jcsd
  3. Sep 29, 2010 #2

    Ivan Seeking

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  4. Sep 29, 2010 #3

    berkeman

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    So do we aim some big antennas and start transmitting? CQ, CQ, ...

    Or do we heed Hawking's warning, and stay silent...
     
  5. Sep 29, 2010 #4

    cronxeh

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    Can we send Hawking there, as a probe?
     
  6. Sep 29, 2010 #5

    Ivan Seeking

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    ??? Don't you mean, ET, ET...?

    If there is anything to worry about, which is highly unlikely even under the most exotic scenarios one can imagine, they already know we're here. Right about now they should be watching Cheers, Roseanne, and Cosby.
     
  7. Sep 29, 2010 #6

    berkeman

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    :biggrin: OMG, you owe me a new keyboard! :biggrin:
     
  8. Sep 29, 2010 #7
    If there are intelligent aliens on that planet then they are probably watching George H. Bush's inauguration by now.
     
  9. Sep 29, 2010 #8

    Ivan Seeking

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    Aren't you off by a decade or so?

    Edit: Oh, H!
     
  10. Sep 29, 2010 #9

    DaveC426913

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    g?

    G???

    I haven't heard anything about e or f!

    I'm going to have to update my "[URL [Broken] 581 Primer
    Gliese-planets.gif
    [/URL]
     
    Last edited by a moderator: May 5, 2017
  11. Sep 29, 2010 #10
    Basically an equivalent Arecibo sized dish located 20 light-years away could easily pick up lots of leakage signals from earth.
     
  12. Sep 29, 2010 #11
    Gliese is now a six planet system.
     
  13. Sep 29, 2010 #12
    Cable theft will not be tolerated. Time Warner is already on it.
     
  14. Sep 29, 2010 #13

    DaveC426913

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  15. Sep 29, 2010 #14

    DaveC426913

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    g will be a one-face planet. It will bake on its eternal day side, freeze on its eternal night side and be toasty warm in a band between the two.
     
  16. Sep 29, 2010 #15
    Poor buggers, I cringe at 90's TV shows all the time. They'd have it all to come...
     
  17. Sep 29, 2010 #16

    DaveC426913

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    Hm. Not going to be a pleasant place to vaykay.

    3-4x the mass, 1.2-1.4x the radius.

    So gravity there will be about 2x Earth's, with a margin of error either way.
     
  18. Sep 29, 2010 #17

    Ivan Seeking

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    I thought you meant GWB for a moment. I was questioning the year.
     
  19. Sep 29, 2010 #18
    Although, we might get better programming from their side. I suppose there might be broadcasts they'd be equally embarrassed by.
     
  20. Sep 30, 2010 #19
    Or they've progressed to the point where they choose to remain hidden and we can't detect them.

    I've considered writing a zoo hypothesis short story about aliens, ~100 l.y. distant, ~5000 years more advanced than we currently are. I'd focus on their internal debates over the few thousand years of observations - whether to intervene, to send probes, the best ways to observe without being detected...
     
  21. Sep 30, 2010 #20

    berkeman

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    But Arecibo is side-looking, isn't it? Do we have anything big that can orient on our polar axis?

    I wonder which way this new planet's polar axis points....
     
  22. Sep 30, 2010 #21

    D H

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    Yeah. Calling this an Earth-like planet is a bit like the joke about the two statisticians who went duck hunting.
     
  23. Sep 30, 2010 #22

    berkeman

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    Thank goodness for Google!

    http://www.wildbirds.com/dnn/AboutUs/BirdJokes/tabid/692/Default.aspx

     
  24. Sep 30, 2010 #23

    DaveC426913

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    Let's call it Earthesque.

    :biggrin:
     
  25. Sep 30, 2010 #24

    Ivan Seeking

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  26. Oct 1, 2010 #25
    Just because an environment is condusive to carbon based life (which can't possibly be the only type of life out there in such a massive universe) doesn't mean that
    1. It has evolved
    2. It is more intelligent than simple bacteria or even something as complex as a rabbit
    3. It hasn't become so advanced it has effectively wiped itself out

    The universe is approximately 14 billion years old, and this particular planet is surely a few billion years old at least, so even if it did have life at one stage it's not a certainty that life still exists there.
     
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