New Mars Forums

https://www.nextbigfuture.com/2017/10/f … -cave.html

100 m wide x 50 000 m long x ~50m ceiling high ( ~20 floors )

5 000 000 m2 = 5 km2

~ 30 000 population?

Monaco.

SpaceNut,

don't understand what you mean?

VENUS - easy.:

Excite as many of these as necessary towards Venus.:

http://www.sciencealert.com/run-for-cov … ards-earth

utilize both the kinetic energy of the plasma (by MHD down to cryonic cold) and its hydrogen to convert the H + CO2 into water and graphite.

Tom,

Beautiful!

BUT, Earth radius? Show me it's possible in material strength, pls.

Why go at all over the proven diameters? - up to 5000km wide by using carbon.

Paul Birch.:

The only practical Dyson Spheres are the Paul Birch supra- designs onto kinetic structures.

The inside-out 'classical' design relies upon 'gravity generators' which ... if we have grav-gens this is = to direct space-time control, so we won't need to terraform planets and stars but we'll build universes

and with ... optics, incl. josh storrs hall weather machine, the sunlit vs night side becomes question unsubstantial.

Smaller stars = smaller proplyds = smaller 'giants'.
TRAPPIST-1 is only 80-ish Jovian masses, i.e. just on the upper borderline of brown dwarf-hood.
The good news is that such stars are REALLY plentiful, massive majority.

"BUY land, advised Mark Twain; they’re not making it any more."

In fact - ... yet.

I have a question - how big qualifies for 'outdoors'?

Just to note that http://www.worlddreambank.org/D/DUBIA.HTM -ization of Earth IS landmaking, too.

OK, some coastal lands shall be drowned, but the deserts - cold and hot will disappear ( forests from pole to pole as it was few dozens of millions of years ago with approx. the same distro of water/land, continental pattern ... ) , hence the landmaking balance shall be positive by at least a factor of magnitude.

Opening up all ocean currents lines and creation of new ones will in fact stabilize the climate...

Aside from the basic specs generalized in the quoted above wiki article, I insist it is matter of size / scale.

pad/seat -> floor/deck -> plot -> land -> world ...

A ship or raft turns into piece of land when it is country size - it is subjective human-size criterion, though ... a country-size seems connected with the time to cross it on feet / walking?

It seems the islands sizes / areas can give as a (historic) base for grokking the scaling?

"Country-size" whatever that means poses the boundary between "house"/"town" and "world" levels.