• Goodie@lemmy.world
    0·
    6 months ago

    It depends on how bright it is where you are.

    When it’s very very dim your color sensing part of your eyes, which are less sensitive to light, don’t work. Only the black and white parts of your vision work.

    Kind of.

  • RizzRustbolt@lemmy.world
    0·
    6 months ago

    Because it’s travelling backwards in time. That’s why it appears in black and white. You’re only seeing the past version of it.

  • Victor@lemmy.world
    0·
    6 months ago

    In my experience the aurora borealis is always green. I live in the north of Sweden.

      • 56!@lemmy.ml
        0·
        6 months ago

        The red parts are rarer and harder to see. Especially with the naked eye.

        The red parts were very visible last night, and I found their colour much easier to see with the naked eye than the green parts ever are.

            • Victor@lemmy.world
              0·
              6 months ago

              Thank you! What’s it like normally where you live? What colors are the Arora normally?

              • 56!@lemmy.ml
                0·
                6 months ago

                I would usually describe it as grey. There have been a few times where a sunset or the moon have provided some contrast, causing the greenness to become slightly noticeable. Last night was the first time I’ve seen such an obvious pink.

                Sadly it doesn’t get dark enough here at this time of year, so my family down south had a better view.

    • Turun@feddit.de
      0·
      6 months ago

      It depends on which part of the atmosphere reacts. Pink/purple/red is also possible.

  • ShittyBeatlesFCPres@lemmy.worldEnglish
    0·
    6 months ago

    I live too far south to see it but my understanding is that at different layers of the atmosphere, the stellar material interacts with different elements. So, it gets green or pink or whatever depending on how deep it goes.

  • 🐋 Color 🔱 ♀@lemm.ee
    0·
    6 months ago

    Rods are more sensitive to light than cones. This is why in low light, colors appear muted. In this context, photographers can adjust the length of exposure to get an image that is more colorful than what our eyes can perceive. Really depends on how bright the aurorae are which can be affected by various factors such as light pollution, solar wind speed, and latitude.

  • N0x0n@lemmy.ml
    0·
    6 months ago

    Uhhhh, I saw them yesterday in southern hemisphere in Europe and they waren’t white at all… So my guess would be that it depends from where you look at it ?

    Also, in reality they are more dull than on pictures, because photographers use Long Exposure to make the color brighter than they actually appear.

    • kirklennon@kbin.social
      0·
      6 months ago

      A long exposure allows more of the light to be captured but that’s not the reason for the color discrepancy. They really are as colorful as they appear in photos but human night vision is primarily black and white. We just don’t see a lot of color unless it’s sufficiently bright and since auroras are still quite dim in absolute terms, our eyes aren’t capable of recognizing the full intensity of the color.

      • N0x0n@lemmy.ml
        0·
        6 months ago

        Hey thanks for the clarification :) ! I’m not a photographer nor educated enough in specific science domain.

        I only pointed out what technique photographers use to make them appear so bright and colorful on pictures.

        They really are as colorful as they appear in photos but human night vision is primarily black and white.

        Does that even make sense? I mean, we are what we are, and we see what we see. There is noway that we could certainly know how they actually look like.

        If a reptile looks at an Aurora Borealis, It would totally see it differently, and it’s perspective would differ from ours.

        With a camera you can change alot of attributes to make it appear b/w, sepia, more light, rgb, cmjn, infrared, flash… But that doesn’t make it how they actually appear, I mean who is in charge to give the correct mixture of how much light, b/w, cmjn, rgb, infrared… to see the “real” manifestation ?

        Personally, I think this is more a philosophical question, but I’m no expert in any of those subjects. I’m just relying on my personal experience and my feelings ^^.

        Feel free to argument !

    • dingus@lemmy.worldEnglish
      0·
      6 months ago

      Uhhhh, I saw them yesterday in southern hemisphere in Europe.

      Wait what? Surely something here has a typo, right???

  • 56!@lemmy.ml
    0·
    6 months ago

    It’s the green parts that look white / grey. I believe it’s more of an illusions - if you have something to contrast it with, such as the moon, you can start to see a slight green tint. The pink I saw last night was very noticeable though.

  • VisualBuilder4@lemmy.world
    0·
    6 months ago

    My quick guess is that it is so dim, that our eyes are seeing it mostly with the rods (instead of the cones), which only see black and white. „In the night all cats are gray“