Recent content by glappkaeft

  1. glappkaeft

    Our Beautiful Universe - Photos and Videos

    IIRC those match the sunspots recorded that day. I looked it up that day using https://www.spaceweather.com and those are the locations I remember (the site don't have historical data).
  2. glappkaeft

    Stargazing Q: Meridian flip

    Never heard any other mount do that so if it not limited to Losmandy mounts then at least not a common limitation.
  3. glappkaeft

    Space Stuff and Launch Info

    I saw a upper stage venting while trying out a new telescope mount. Got this images using my phone. I think this is the Space X NROL-69 launch. The time was pretty much 19:00 UTC and it launched 17:48. Location was outside Linköping, Sweden.
  4. glappkaeft

    Our Beautiful Universe - Photos and Videos

    Some one day late New Years fireworks from Sundsvall, Sweden. All images are 4 second exposures on a tripod, with a Canon EF 14mm f/2.8 L USM II lens at f/4, on a Canon 5D mk IV using ISO3200.
  5. glappkaeft

    What are the odds?

    No, one is the only value that would cause a miss in this case and 2 or more would result in a hit so they would be equally good. The expected value from launching 12 of those missiles is 10 hits, he got none.
  6. glappkaeft

    What are the odds?

    If it wasn't for the fact that there where many of us there that remembers it, yes.
  7. glappkaeft

    What are the odds?

    I once walk up to a miniature gaming table just as a friend launched 12 missiles of some sort from his Warhammer 40K figures (Space Marine Dreadnoughts/Terminators/something like that, I don't play WH40K). The missiles hit on 2 or more on a six-sided die and he rolled 12 dice in one go and all...
  8. glappkaeft

    Could a nuclear powered rocket be safely launched from Earth?

    Only this prototype that was build by General Atomics and tested in 1959 using conventional explosives. https://airandspace.si.edu/collection-objects/propulsion-test-vehicle-project-orion/nasm_A19721008000
  9. glappkaeft

    Could a nuclear powered rocket be safely launched from Earth?

    Another issue is that the 500-1000 nuclear bombs the different Orion concepts used would be a new kind of expensive. The concept as based on the availability of small cheap fusion bombs without a fission starter that would soon be invented. 60 years later they still don't exist.
  10. glappkaeft

    Our Beautiful Universe - Photos and Videos

    Quick stack and edit of comet C/2023 A3 (Tsuchinshan-ATLAS) shot using a simple tripod from earlier tonight (CET). 11 individual 6s exposures with 70 mm focal length (Canon 70-200mm F4L @ F/5.6 and a Canon 5D mk III @ ISO 6400). Note the faint anti-tail and globular cluster Messier 5 (fuzzy spot...
  11. glappkaeft

    Thermal effects in aircraft engines - sudden/rapid cooling

    I believe that this is usually called leasing. ;) Which is a common thing when it comes to aircraft engines.
  12. glappkaeft

    Crowdstrike debacle for Microsoft Windows Update

    Why would that help? Crowdstrike is a not a Microsoft product. It is a separate publicly traded company.
  13. glappkaeft

    Boeing Keep your seatbelt low and tight in flight, especially when seated next to a plugged door

    Having an engineer as a CEO is no panacea. The CEOs when Boeing moved the HQ to Chicago, merged with McDonald Douglas and made a lot of questionable decisions was Philip Condit (Master and PHD in Aeronautical Engineering) and Harry Stonecipher (BA in Physics). The CEO during the 737 Max fiasco...
  14. glappkaeft

    I Any Galaxy (Milky-way) based coordinate systems?

    Also we know with pretty high precision where the sun is. The location of the center of the galaxy has very wide error bars (+- 0.8 kpc from Reid et al 2009, ApJ, 705, 1548) so it is pretty useless as the center for calculations.
  15. glappkaeft

    I Very bright geo satellite in my night sky?

    No, Jupiter can be seen before sun rise in southern Germany right now. Edit: also Mars and, out of frame, to the right Saturn.
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