Another cloud free day in Scotland let me catch almost 9 hours of this huge and lively prom. Taken with my home made 90mm modded Coronado PST and DMK21 camera. Software: CdC, Eqmod, DSSR, AutoStakkert!, Wavesharp, DVS, Shotcut and Gimp.

David Wilson on April 8, 2025 @ Inverness, Scotland

https://spaceweathergallery2.com/indiv_upload.php?upload_id=221951

  • IninewCrow
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    761 month ago

    All that energy and here we are burning oil like cavemen in the dark.

  • @nexguy@lemmy.world
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    571 month ago

    Looks like the video is about 20 minutes of real time per 1 second of video. There are dops of plasma that fall further than the diameter of Earth in less than one in video second… which means the plasma is falling the more than the diameter of Earth in less than 20 minutes. That’s close to 100,000 mph or 160,000 kph. Dang

    • @andros_rex@lemmy.world
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      201 month ago

      About 0.01% of the speed of light. I got a Lorentz factor of 1.00000001 so not quite fast enough for relativistic stuff.

      • @Sconrad122@lemmy.world
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        211 month ago

        Description says the poster caught 9h of video, but based on the clock watermark in the top left, what is shown is about 7.5h of video (maybe cut for the interesting bits/highest quality) from 0830ish to 1600ish) at a rate of roughly 20 minutes of real time per 1 second video time, as the original commenter pointed out

  • @1luv8008135@lemmy.world
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    551 month ago

    So dumb question, but what’s causing the gap between the plasma cloud(?) and the surface? And is that gap filled with something that is invisible?

    • @crapwittyname@lemm.ee
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      851 month ago

      Plasma is electrically charged, so it interacts with magnetic lines.
      The sun has magnetic field lines just as the earth does. It also rotates. But- since it’s not solid, it doesn’t have to rotate all at the same speed. The plasma in fast-rotating regions drags the field lines further than the plasma in slow rotating areas, creating weird loops, breaks and reconnections in the field lines. I’m almost certain that what we’re seeing in this lovely bit of photography is a cloud of plasma travelling across, or trapped by one of those rogue field lines which has been pushed upwards from the surface by differential rotation.

    • @niktemadur@lemmy.world
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      351 month ago

      The dynamics there due to sheer gravity, magnetism and levels of energy/radiation that are utterly alien to our daily experience.

      • NιƙƙιDιɱҽʂ
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        211 month ago

        I get some of the basic underlying mechanics, but I absolutely cannot comprehend it. Incredible.

        • @perestroika@lemm.ee
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          1 month ago

          A guess: doubly ionized helium vs. singly ionized helium. They absorb different amounts of radiation (have different opacity). At high opacity it gathers heat and subsequently expands. At low opacity it lets the heat pass through, subsequently cools and condenses.

          (This is the mechanism that makes Cepheid stars regularly and predictably change intensity. The same mechanism is probably present in other stars too, and causes local processes that we cannot observe from another star system… but can observe in the Sun.)

          Alternatively, there could be a multitude of other effects doing something similar.

  • @gcheliotis@lemmy.world
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    341 month ago

    Absolutely amazing that you could capture that with “amateur” equipment, although it is clear from your post that a lot went into this. Bravo!

  • @Sgarcnl@lemmy.world
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    181 month ago

    If the earth to scale is accurate, the drops coming to the surface might be approximately close to the land mass of a large continent.

  • @danc4498@lemmy.world
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    141 month ago

    Is this the actual image your camera sees? Or is it more like heat sensors visualized, or something like that?

    • @GamingChairModel@lemmy.world
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      201 month ago

      “actual image your camera sees” is a term that is hard to define with astrophotography, because it’s kinda hard to define with regular digital photography, too.

      The sensor collects raw data on its pixels, where the amount of radiation that makes it past that pixel’s color filter actually excites the electrons on that particular pixel and gets processed on the image processing chip, where each pixel is assigned a color and it gets added together as larger added pixels in some image.

      So what does a camera “see”? It depends on how the lenses and filters in front of that sensor are set up, and it depends on how susceptible to electrical noise that sensor is, and it depends on the configuration of how long it looks for each frame. Many of these sensors are sensitive to a wide range of light wavelengths, so the filter determines whether any particular pixel sees red, blue, or green light. Some get configured to filter out all but ultraviolet or infrared wavelengths, at which point the camera can “see” what the human eye cannot.

      A long exposure can collect light over a long period of time to show even very faint light, at least in the dark.

      There are all sorts of mechanical tricks at that point. Image stabilization tries to keep the beams of focused light stabilized on the sensor, and may compensate for movement with some offsetting movement, so that the pixel is collecting light from the same direction over the course of its entire exposure. Or, some people want to rotate their camera along with the celestial subject, a star or a planet they’re trying to get a picture of, to compensate for the Earth’s rotation over the long exposure.

      And then there are computational tricks. Just as you might physically move the sensor or lens to compensate for motion, you may just process the incoming sensor data to understand that a particular subject’s light will hit multiple pixels over time, and can get added together in software rather than at the sensor’s own charged pixels.

      So astrophotography is just an extension of normal photography’s use of filtering out the wavelengths you don’t want, and processing the data that hits the sensor. It’s just that there needs to be a lot more thought and configuration of those filters and processing algorithms than the default that sits on a typical phone’s camera app and hardware.

    • @jdnewmil@lemmy.ca
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      121 month ago

      Not OP, but solar photography requires super dense filters so like sunglasses alter what you see from “actual” the filters also alter the image from “actual” yet this is what would “actually” be “seen” by the camera. So yes and no depending how you want to interpret “actual”.

      • @danc4498@lemmy.world
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        31 month ago

        Thanks, this makes sense. I’ve heard there are some great astronomy photos where what we are seeing isn’t actually visible to the naked eye. Rather it’s invisible gases or something, and the photos are just visualizations based on assigning colors to density… I guess I was wondering if it was something like that. It sounds like it’s not.

        • @jdnewmil@lemmy.ca
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          21 month ago

          When they sense invisible electromagnetic wavelengths like xrays or microwaves and “assign” colors to completely invisible wavelengths then that is false color imaging. Possible to do with the sun… but unlikely with an amateur rig.