Environmental News

Discussion in 'Environmental Discussion' started by tochatihu, Oct 22, 2015.

  1. tochatihu

    tochatihu Senior Member

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  2. ChapmanF

    ChapmanF Senior Member

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  3. bisco

    bisco cookie crumbler

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  4. bisco

    bisco cookie crumbler

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    might be more important to clean up the debris on earth first
     
  5. tochatihu

    tochatihu Senior Member

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    Chap's link is correct. Debris on earth is also a concern but it moves much slower.
     
  6. bisco

    bisco cookie crumbler

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    it's doing a pretty good job on the oceans and water supplies
     
  7. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Dang, I was pumped for EV charging discussion since I think I’ve figured out a clever solution. Maybe later.

    As for orbital debris, in theory it can become a barrier to our planet future satellites. The Starlinks are at a low enough orbit they require an active boost system or they naturally decay to reentry and burn-up.

    Bob Wilson
     
  8. T1 Terry

    T1 Terry Active Member

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    Was this part of an Elon strategy to litter the area so badly that no competitor could use the same region and be forced into achieving a higher orbit?
    The fact he has made it so messed up that his own satellites have to play dodgems, might mean he didn't realise how fast it could escalate into a virtual no go zone ..... his satellites can dodge the bits at the moment .... until they run out of fuel, but what about all the other junk that is unpowered and can't play dodgems, so collide and just add more litter ....

    The smaller the pieces, the harder to detect, but they still make holes in other objects travelling slower than they are and at a different orbital path .....

    Maybe, they have built a space protection layer that will stop the Martian's from invading :LOL:

    T1 Terry
     
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  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    The relatively higher drag at Starlink altitudes quickly degrades any unpowered ones into re-entry. Higher orbits have less residual drag so they have a longer interval to play ‘bumper cars.’

    Bob Wilson
     
  10. tochatihu

    tochatihu Senior Member

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    Star-de-linked are now re entering about one per week. One assumes they use their last bit of ion thrust to splash at Point Nemo but I have not seen that discussed.

    An important risk of orbiting pieces too small to track is disabling orderly de-orbiting of satellites. Those then become bumper cars with large cross sectional areas. Bumper cars might not be an ideal analogy because that game is based on surviving impacts.

    ==
    Giving Earth an orbital shield of Kessler debris might work in sci fi, but if ETs manage to get all the way here, they'd need to have good bumpers already installed.
     
  11. jdenenberg

    jdenenberg EE Professor

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    I am a senior life member of the IEEE, so if you can't get to an article, I may be able to access it, save it to my web site and provide access.

    JeffD

    ps. @bisco, I can play a scientist on TV so ask questions.
     
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  12. ColoradoBoo

    ColoradoBoo Senior Member

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    US Space Force doesn't have any problems tracking space debris. I've seen their displays and zoomed in and they can even see bolts floating around. You click on the object and it will ID it for you. (Example: Cat ##, Jun 74, Skylab bolt)

    More recently, they are using satellites to catalog and track debris.

    If space stuff fascinates you, do some internet searching about "Starfish Prime" You're welcome....
     
  13. hill

    hill High Fiber Member

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    Funny that this explosion would come up. My father-in-law (now in his mid 90s) was out on that Atoll observing his electrical engineering handiwork.

    IMG_20240403_170422.jpg

    Probably not many left that actually worked on those early experiments. Although apparently a treaty that prohibited experimenting to improve emp's - yea it still went on. That blast took out power on the island of Kauai.
    good times
     
    #2853 hill, Oct 3, 2025 at 2:42 PM
    Last edited: Oct 3, 2025 at 3:31 PM
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  14. tochatihu

    tochatihu Senior Member

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    "US Space Force doesn't have any problems tracking space debris" Larger than 1 cm, no one (in that business) does.

    "More recently, they are using satellites to catalog and track debris." Satellite capable of doing this by plasma wake detection from smaller bits has been described and designed but not launched yet.

    In a timely story, Stephen Clark lists largest orbital debris hazards:

    Removing these 50 objects from orbit would cut danger from space junk in half - Ars Technica

    I am not aware of any plans to de orbit large chunks. That would be helpful.

    ==
    "If space stuff fascinates you ..." It does, and others here besides me also. I would presume all such know of Starfish Prime.