Re: [TML] Where the UPP fails me... shadow@xxxxxx (01 May 2020 01:06 UTC)
Re: [TML] Where the UPP fails me... Cian Witherspoon (01 May 2020 01:48 UTC)
Alderson Discs (was: Where the UPP fails me...) shadow@xxxxxx (02 May 2020 10:04 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) Timothy Collinson (02 May 2020 10:36 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) shadow@xxxxxx (05 May 2020 03:06 UTC)
Re: [TML] Alderson Discs Rupert Boleyn (05 May 2020 03:25 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) Phil Pugliese (05 May 2020 22:25 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) kaladorn@xxxxxx (05 May 2020 22:58 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) kaladorn@xxxxxx (05 May 2020 16:01 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) Jeff Zeitlin (05 May 2020 19:01 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) kaladorn@xxxxxx (05 May 2020 20:03 UTC)
Re: [TML] Alderson Discs Kelly St. Clair (06 May 2020 01:28 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) Phil Pugliese (06 May 2020 02:21 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) shadow@xxxxxx (06 May 2020 18:36 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) kaladorn@xxxxxx (06 May 2020 19:10 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) Richard Aiken (10 May 2020 00:38 UTC)
Re: [TML] Alderson Discs (was: Where the UPP fails me...) shadow@xxxxxx (10 May 2020 23:44 UTC)
Re: [TML] Where the UPP fails me... kaladorn@xxxxxx (01 May 2020 17:53 UTC)
Re: [TML] Where the UPP fails me... Phil Pugliese (01 May 2020 20:12 UTC)
Re: [TML] Where the UPP fails me... shadow@xxxxxx (02 May 2020 10:04 UTC)
Re: [TML] Where the UPP fails me... kaladorn@xxxxxx (02 May 2020 16:16 UTC)

Re: [TML] Where the UPP fails me... shadow@xxxxxx 01 May 2020 01:06 UTC

Ringworlds require unreasonably strong materials. Dyson spheres are
worse.

But Alderson discs take the prize. they need some sort of reinforcing
to prevent them collapsing radially into a sphere. Worse, the amount
of material required would use up all the matter in quite a few solar
systems. Like hundreds or thousands. Probably more than that (I don't
feel like doing the math right now).

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com