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Discussion in 'Off-Topic' started by bg1256, Sep 16, 2006.

  1. bg1256

    bg1256 IncGamers Member

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    Hat-p-1

    linky

    I found this pretty interesting. It might be old news, but it's news to me.


    This part intrigued me. I know squat about astronomy...does anyone know how they can know anything with confidence, when they can't even view it directly?
     
  2. Sokar Rostau

    Sokar Rostau IncGamers Member

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    Take a lightbulb and sweep your hand across it. See that shadow? That's how it works.

    New planets aren't even news anymore. There's about 50 of them, all bigger than Saturn and most bigger than Jupiter. It's easy to find a planet that's 15 times the size of Jupiter...
     
  3. bg1256

    bg1256 IncGamers Member

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    I was referring more to the density, etc. How do they know its density if they can't even see it? And they seem so confident too.
     
  4. Merick

    Merick IncGamers Member

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    Well, to figure the density you need mass and size. I guess they can get the size by measuring the dimming of the star as it passes by. The mass I think can be derived from how far away it is from the sun, so they should be able to find that too by finding an how the light output of the star varies as it passes by.
    Or so seems to make sense to me.
     
  5. Dondrei

    Dondrei IncGamers Member

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    It's all pretty hazy guesswork. We really need to extend our baseline to get some more convincing data. Or better yet send actual probes.
     

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