Re: Non-Dyson sphere?

On 21 mei, 10:31, Richard Burke <i...@xxxxxxxxxxxxxxxxxx> wrote:
In article <1179538907.758155.117...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,

VGer47 <geldere...@xxxxxxxxxxx> wrote:
When thinking about Dyson sphere's and other mega structures a thought
struck me: what if you built a hollow sphere out of the same
Unobtanium used for Dyson spheres, but made it smaller - say, no
larger than the sun, or if necessary, Jupiter - put a rocky outer
layer around it with sufficient mass to get a surface gravity of 1 G,
spun the whole thing up to rotate in 24 hours and then put it in the
right orbit around the sun, would the result be habitable (given
proper terraforming of course)? Would it be stable? How big an outer
layer would you need to get 1 G at the surface? (Seeing as my math is
terrible and I don't trust myself to come up with any realistic
answer)>

No liquid core would mean no magnetic field, and therefore pretty heavy
radiation exposure. But presumably you could design the unobtanium to
handle that.

Richard

____
Richard Burke
<www.richardburke.co.uk>

Right, I hadn't thought of that. But wouldn't the same problem arise
with a Dyson spere or a Ringworld? (Or an Alderson disk if I've got
that name right.)?

Makes me wonder what else I've overlooked...

VGer47


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