This was a really well written article describing what we know about Neptune.

    • Freeman@lemmy.pubOP
      link
      fedilink
      arrow-up
      5
      ·
      1 year ago

      The reality is we dont really know. The “surface” in this article is where the pressure is largely 1 atm. And at that pressure its mostly liquid (albeit hot)

    • shadowspirit@lemmy.world
      link
      fedilink
      arrow-up
      3
      ·
      edit-2
      1 year ago

      That’s a good question that hopefully someone more learned will be able to respond to but you know most of the Earth’s surface is water so I suppose Neptune has a surface. I don’t know what the technical definition is but I’m assuming it’s where particulate / molecules in the atmosphere change states due to temperature and pressure. A bit like how we have H2O in the form of gas as water vapor in the atmosphere and at the surface a liquid as water. The closer you are to the center of the planet the higher the pressure and the temperature.

      • octoperson@sh.itjust.works
        link
        fedilink
        arrow-up
        3
        ·
        1 year ago

        If the pressure is high enough, you can get a smooth transition between gas and liquid without any sort of boundary that you could identify as a surface. That’s thought to be what happens on Jupiter, don’t know about Neptune