[ExI] OP-ED: The billionaire space race reflects a colonial mindset that fails to imagine a different world

[Adrian Tymes]

On Fri, Aug 27, 2021 at 12:16 PM Anton Sherwood via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> I wonder, how big would an O'Neill cylinder need to be for part of the
> sky to be blue?  Remember that air density does not drop off in the same
> way as here.
>

That depends on the atmospheric composition.  Planetary ground level to
ground level lines of sight might be comparable.
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