29 votes

This super-Earth is the first planet confirmed to have a permanent dark side

9 comments

  1. [5]
    wowbagger
    Link
    I find it fascinating to ponder what life would be like on a tidally locked planet. You'd have to choose your preferred light level by longitude, and there'd be a strip of land on each side of the...

    I find it fascinating to ponder what life would be like on a tidally locked planet. You'd have to choose your preferred light level by longitude, and there'd be a strip of land on each side of the globe that's in perpetual sunset/sunrise (is it even still called that if the sun never actually sets or rises?). It's very odd to think about a planet where the sun never moves from its spot in the sky, where shadows never move or shorten or lengthen. I think it would be exceedingly difficult for humans to adjust to, just based on how hard it is for us to deal with the huge daylight swings at the higher latitudes of our own planet.

    10 votes
    1. TMarkos
      Link Parent
      I have this paper bookmarked for writing reference purposes, it describes the impacts that a tidally locked planet would experience on weather, all else being equal:...

      I have this paper bookmarked for writing reference purposes, it describes the impacts that a tidally locked planet would experience on weather, all else being equal:

      https://arxiv.org/pdf/1802.00378.pdf

      For a more approachable and less detailed answer:

      https://www.quora.com/What-sort-of-a-weather-system-is-theorized-on-a-tidally-locked-planet

      It's an interesting thought experiment. I doubt it would be a pleasant place to live.

      14 votes
    2. semsevfor
      Link Parent
      Humans as we know it definitely wouldn't be able to exist there, but the life that does exist there whatever form it is, would have evolved either in perpetual day, night, or maybe some kind of...

      Humans as we know it definitely wouldn't be able to exist there, but the life that does exist there whatever form it is, would have evolved either in perpetual day, night, or maybe some kind of migratory pattern on the edge between the two.

      So to them having the sun move so rapidly would be just as wild to adapt and think about. They would be so used to an unmoving sun

      10 votes
    3. mild_takes
      Link Parent
      I don't know if most humans could really adapt to that very well. Native life on a planet like that would be wildly different.

      I think it would be exceedingly difficult for humans to adjust to, just based on how hard it is for us to deal with the huge daylight swings at the higher latitudes of our own planet.

      I don't know if most humans could really adapt to that very well. Native life on a planet like that would be wildly different.

      4 votes
    4. Fiachra
      Link Parent
      I imagine that a star heating only one side of the planet for billions of years would cause some pretty extreme wind

      I imagine that a star heating only one side of the planet for billions of years would cause some pretty extreme wind

      2 votes
  2. [4]
    SaltSong
    Link
    I'm wondering if they left a phrase out somewhere, or if I'm mistaken, but I'm pretty sure Mercury is tidally locked to the sun.

    I'm wondering if they left a phrase out somewhere, or if I'm mistaken, but I'm pretty sure Mercury is tidally locked to the sun.

    3 votes
    1. Diff
      Link Parent
      From what I can find, Mercury's days are longer than its years, and are harmonic with its years, but not 1:1 tidally locked.

      From what I can find, Mercury's days are longer than its years, and are harmonic with its years, but not 1:1 tidally locked.

      6 votes