Consequences of minnig orbital bodies
darby eckles
(16 Jun 2016 19:24 UTC)
|
Re: [TML] Consequences of minnig orbital bodies
C. Berry
(16 Jun 2016 19:39 UTC)
|
Re: [TML] Consequences of minnig orbital bodies Tim (17 Jun 2016 03:51 UTC)
|
Re: [TML] Consequences of minnig orbital bodies
Knapp
(25 Jun 2016 21:05 UTC)
|
Re: [TML] Consequences of minnig orbital bodies
C. Berry
(25 Jun 2016 21:55 UTC)
|
Re: [TML] Consequences of minnig orbital bodies
Tim
(26 Jun 2016 04:43 UTC)
|
Re: [TML] Consequences of minnig orbital bodies Tim 17 Jun 2016 03:51 UTC
On Thu, Jun 16, 2016 at 07:24:34PM +0000, darby eckles (via tml list) wrote: > Question for the astrally informed:Assuming a Sol-like system, say a > planet like earth had been hollowed out, or had it's magma and core > removed leaving just a shell. Would the remainder's gravity be > reduced on the surface? Would it's gravitational pull be reduced? Very greatly. The mass of Earth's crust is less than 1% of the mass of the planet, with a corresponding reduction in gravity on the surface if that's all that was left. The interior gravity would be close to zero. Despite that, the planet would still need substantial internal support to avoid collapsing inward. It could no longer retain an atmosphere, either. The interior could probably be sealed and filled with air, but that would have to come from elsewhere. The mass of air inside the nearly zero gravity hollow would need to be hundreds of times greater than the original atmosphere above the surface. Oxygen could be extracted from rock during the mining process, but there's nowhere near enough nitrogen in an Earthlike planet to source it locally. > Would the overall reduction of mass of the planet distort the orbits > of other planets? Not noticeably. In the specific case of Earth, the Moon would leave orbit unless engineered to remain. - Tim