• dfyx@lemmy.helios42.deEnglish
      25·
      3 months ago

      Very very likely not the first. We‘ve had rovers on mars for about three decades now and all of them had cameras. Mars days are only slightly longer than earth days so there have been over 10000 opportunities to just point a camera at the horizon and take a picture.

    • Sheridan@lemmy.worldEnglish
      10·
      3 months ago

      I’ve seen blue sunset pictures from Mars before, but I suspect someone pumped up the saturation on this picture.

        • hector@lemmy.todayEnglish
          1·
          3 months ago

          Thanks that was interesting. Does mars wobble on it’s axis? I know they have a summer and winter so they must I guess. In the winter they get what looks like ice build up around the pole not getting sun, but it’s dry ice, co2, super cold -276 or something like that.

          • bear@lemmy.blahaj.zoneEnglish
            2·
            3 months ago

            There’s a semi-permanent ice cap that’s mostly water, but in the winters about a quarter of the atmosphere condenses down into dry ice. The axial tilt is very similar to Earth, but the seasons last significantly longer, and the orbit around the Sun is more elliptical.

        • hector@lemmy.todayEnglish
          1·
          3 months ago

          Pretty sure there aren’t any golf courses on Mars yet. Such a waste they are short enough of water.

            • hector@lemmy.todayEnglish
              11·
              3 months ago

              Pfas that’s why. Astroturf is lousy with pfas. Mars is slippery enough as is without adding more deathslip substance.

  • ExLisper@lemmy.curiana.netEnglish
    71·
    3 months ago

    Looks like shit. Earth blows this dead red rock out of the water, again. No competition.

    Team Earth!

      • RampantParanoia2365@lemmy.worldEnglish
        31·
        3 months ago

        This person is appreciating a photo, and then he calls them a piece of shit for not appreciating said photo. He does this often? Is this a parody account, or the real scientist?

        • UnrepentantAlgebra@lemmy.worldEnglish
          4·
          3 months ago

          Neil “Smoke” deGrasse Tyson.

          I don’t think this is the astronomer talking, unless he forgot to log out of his personal account.

  • udon@lemmy.worldEnglish
    2·
    3 months ago

    How large would the sun look to the human eye though? It’s tiny on photos, usually appears much bigger

  • Fizz@lemmy.nzEnglish
    810·
    3 months ago

    Grok is this true? Why is the sunset on mars blue?

    • Skua@kbin.earth
      30·
      3 months ago

      I would guess it’s essentially the same effect that causes our blue sky in the day and red sky at dawn and dusk. TL;DR if you already know what Rayleigh scattering is, skip to the last paragraph

      Okay so the reason that we can “see” the sky, as in it is lit up and has colour, is that sunlight (which is basically white) gets scattered when it passes through the atmosphere instead of just going straight through. This is an effect called Rayleigh scattering. Rayleigh scattering affects shorter wavelengths more than longer ones.

      If there is too much scattering of a wavelength, chances are that most of it will not make it to a given observer. It’ll either just wind up going off into space or being absorbed by something. During daytime, our atmosphere does this just enough to get rid of most of the ultraviolet light. The next frequency down is blue, which gets scattered enough for us to see it.

      For the sky directly above you to appear blue to you, you need some of the blue wavelengths of light to have made it to that point above you and then get scattered there. Other wavelengths need to have either been absorbed already (like UV) or not scattered much yet (like red).

      During sunsets and sunrises, the light has to pass through much more atmosphere to get to us than it does during the day. As a result, the blue light starts to meet the same fate that UV does during the day, and longer wavelengths like yellow and red are the only ones that make it to us

      So, all that is to set up that Mars has a way thinner atmosphere which does way less scattering. The sky normally looks more or less the same colour as the ground because there’s so little Rayleigh scattering happening that dust kicked up by the wind dominates the colour instead. However, same rules apply as on Earth - sunset means more scattering. It’s just that on Mars, that goes from UV scattering to blue, instead of blue to red.