Re: Could magnets be used for interstellar propulsion?

From	ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups	sci.physics
Subject	Re: Could magnets be used for interstellar propulsion?
Date	2026-02-09 14:19 +0000
Organization	Stefan Ram
Message-ID	<video-20260209150916@ram.dialup.fu-berlin.de> (permalink)
References	<10lnf3n$3mhoh$1@dont-email.me> <field-20260201134701@ram.dialup.fu-berlin.de>

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ram@zedat.fu-berlin.de (Stefan Ram) wrote or quoted:
>However, in nature there are no fields that can be used to accelerate
>a spacecraft this way, so one would have to generate such fields.

  There is a nice video 

"Animation vs. Physics" (2023) - Alan Becker

  where near minute seven, coils placed in space are used to accelerate
  a space ship. While this might not work in reality, it's still nice
  to watch that whole video from start to end (16 minutes).

  I just see there's another video "Animation vs. Math" I have not 
  watched yet . . .

  PS: A web page explains that the idea was that "the south pole of
  Orange's ship is facing the north pole of the first magnetic ring"
  and so the ship is accelerated towards the ring. However, the video
  ignores that when leaving the ring, the ship is still attracted to
  the ring, and therefore it would then be accelerated backwards . . .

Thread

Could magnets be used for interstellar propulsion? Jan Panteltje <alien@comet.invalid> - 2026-02-01 11:57 +0000
  Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-01 12:57 +0000
    Re: Could magnets be used for interstellar propulsion? Jan Panteltje <alien@comet.invalid> - 2026-02-01 16:44 +0000
      Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-01 16:55 +0000
        Re: Could magnets be used for interstellar propulsion? Ian <gay@sfu.ca> - 2026-02-01 16:19 -0800
          Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-02 05:35 +0100
          Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-02 05:40 +0100
            Re: Could magnets be used for interstellar propulsion? John Hasler <john@sugarbit.com> - 2026-02-02 08:02 -0600
              Re: Could magnets be used for interstellar propulsion? Jan Panteltje <alien@comet.invalid> - 2026-02-02 14:44 +0000
              Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-03 04:54 +0100
            Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-02 07:20 -0800
              Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-02 16:30 +0000
                Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-02 19:27 +0000
              Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-02 22:55 +0100
            Re: Could magnets be used for interstellar propulsion? Ian <gay@sfu.ca> - 2026-02-02 14:30 -0800
              Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-03 02:03 +0100
    Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-09 14:19 +0000
  Re: Could magnets be used for interstellar propulsion? Bill Sloman <bill.sloman@ieee.org> - 2026-02-02 00:41 +1100
    Re: Could magnets be used for interstellar propulsion? "Edward Rawde" <invalid@invalid.invalid> - 2026-02-01 09:58 -0500
    Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-02 08:50 -0800
      Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-02 09:28 -0800
      Re: Could magnets be used for interstellar propulsion? John Hasler <john@sugarbit.com> - 2026-02-02 11:49 -0600
        Re: Could magnets be used for interstellar propulsion? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-02 14:23 -0500
          Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-02 12:39 -0800
            Re: Could magnets be used for interstellar propulsion? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-02 15:53 -0500
      Re: Could magnets be used for interstellar propulsion? John Hasler <john@sugarbit.com> - 2026-02-02 11:43 -0600
      Re: Could magnets be used for interstellar propulsion? ehsjr <ehsjr@verizon.net> - 2026-02-02 16:49 -0500
        Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-02 20:42 -0800
          Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-04 20:11 +0100
            Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-05 16:24 -0800
              Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-06 02:09 +0100
                Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-06 00:24 -0800
                Re: Could magnets be used for interstellar propulsion? Bill Sloman <bill.sloman@ieee.org> - 2026-02-06 20:18 +1100
              Re: Could magnets be used for interstellar propulsion? Bill Sloman <bill.sloman@ieee.org> - 2026-02-06 18:07 +1100
                Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-07 01:54 +0100
                Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-07 19:48 -0800
                Re: Could magnets be used for interstellar propulsion? athel.cb@gmail.com <user12588@newsgrouper.org.invalid> - 2026-02-08 11:42 +0000
          Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-05 16:48 -0800
        Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-04 16:36 +0100
          Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-04 08:49 -0800
          Re: Could magnets be used for interstellar propulsion? John Hasler <john@sugarbit.com> - 2026-02-04 10:58 -0600
            Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-04 19:44 +0100
          Re: Could magnets be used for interstellar propulsion? john larkin <jl@glen--canyon.com> - 2026-02-04 18:21 -0800
      Re: Could magnets be used for interstellar propulsion? Bill Sloman <bill.sloman@ieee.org> - 2026-02-03 15:54 +1100
        Re: Could magnets be used for interstellar propulsion? Jeremiah Jones <jj@j.j> - 2026-02-03 20:35 -0800
          Re: Could magnets be used for interstellar propulsion? Bill Sloman <bill.sloman@ieee.org> - 2026-02-04 16:59 +1100
          Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-04 16:58 +0100
          Re: Could magnets be used for interstellar propulsion? ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-05 14:35 +0000
      Re: Could magnets be used for interstellar propulsion? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-04 16:23 +0100
  Re: Could magnets be used for interstellar propulsion? Colin <colin@example.invalid> - 2026-02-01 18:31 +0000
    Re: Could magnets be used for interstellar propulsion? Jan Panteltje <alien@comet.invalid> - 2026-02-02 05:54 +0000

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