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Planet Found in Double Star System

Daniel Dvorkin writes "CNN is reporting that a planet has been found in a double star system. I know, another extrasolar planet -- whoopee! But this one is different since it is in a double star system, and because given the size of the stars (the larger one is about 1.6 times as big as the Sun), the orbit (a little bigger than that of Mars), and the planet (somewhat bigger than Jupiter) it seems very possible that the planet might have a moon of roughly Earth's size and climate. I believe this is the first discovery that comes close to matching those criteria."

2 of 50 comments (clear)

  1. Re:This might sound kinda crazy by Graymalkin · · Score: 5, Insightful

    Who is talking short term besides you? Planet hunters are well aware they're not likely to set foot on a planet they discover orbiting a distant star. They're not thinking they are going to find Earth 2 and fly there. They don't look because of that. They look because they just want to see if we're really as unique as we think we are. We've gone from thinking the Earth was flat and at the center of the universe to knowing it is shaped sort of like a pear and is housed inside of a normal galaxy which turned out to not even look like we originally thought it did. Now we're seeing that not only are we not at the center which the universe revolves but there are planets orbiting stars other than our own. The next step is to find out that we're not the only intelligent group of amino acids and sugar molecules putzing around our galaxy. Hell, we're probably not the only group of self organizing amino acids and sugars putzing around our solar system.

    A moon colony has nothing to do with looking for extra solar planets. Compared to the cost of sending a bunch of stuff into space to crash into the moon in order to build stuff on it building stuff on Earth to look up at light coming from the sky is much more likely, possible, and useful in the near future.

    --
    I'm a loner Dottie, a Rebel.
  2. Other habitable zone planets? by Jason+T.+Wright · · Score: 5, Informative
    it seems very possible that the planet might have a moon of roughly Earth's size and climate. I believe this is the first discovery that comes close to matching those criteria."


    You believe wrongly.

    HD28185 b and IotaHor b both could support moons with liquid water, year-round.

    HD27442 b (aka Epsilon Reticulum) could also do it.

    Other planets visit their star's habitable zones, too. Even though most of these other planets have eccentric orbits which would take them in and out periodically, they still "come close to matching those criteria".

    Also a much better link to details of the Gamma Cephei system can be found here.