Re: Help designing a low gravity world...

On 13 dets, 23:23, IsaacKuo <mech...@xxxxxxxxx> wrote:
On Dec 13, 2:55 pm, Crown-Horned Snorkack <chornedsnork...@xxxxxxx>
wrote:



On 13 dets, 22:06, Russell Wallace <russell.no.s...@xxxxxxxxx> wrote:
IsaacKuo wrote:
The basin is big enough that I imagine there might be one
or two large empires, but most of if is splintered into
small regional powers and city-states. The basin is about
3000km across, with a sloping habitable rim averaging
100km wide. That provides a habitable area roughly
equal to France+Italy, but spread across the coastline
of a sea the size of the Mediterranean.
In addition to the habitable outer rim, there is an
internal ring of huge islands within the sea:
http://pds.jpl.nasa.gov/planets/captions/venus/barton.htm
Ah, now that's interesting. They're hurting badly for total land area,
but what they do have is pretty much ideally arranged to allow commerce
and warfare while encouraging the maintenance of political disunity.
Eden is about 130 millions of square km. If it had, say, half land and
half ocean, there would be 65 millions of square km land - a continent
bigger than Eurasia - and 65 millions of square km of ocean - slightly
smaller than Indian ocean. A mediterranean sea the size of
Mediterranean or of Caribbean and Gulf of Mexico could be quite
plausible.

As specified above, the habitable zone of Eden is limited to just
one large crater basin, 3000km across. Only a fraction of this
basin is land, most of it is a large shallow sea.

Incidentally, Eden actually is about half land and half ocean,
but this is not human habitable. Other than the impact crater,
the northern hemisphere is a frigid high altitude plateau,
while the southern hemisphere is a vast hyper-cane ridden
ocean.

And the tropical coast between them?

Or actually...the plateau might very well be habitable. The
conditions could be like a colder bigger version of the
mongolian plateau, but dominated by dark basalt to keep
the albedo low.

But you could keep the albedo low by dark forests. In winter, the snow
would fall through the branches to ground, and in spring the trees
would stick above snow, warm the air and allow the snow to melt.

Numerous lakes could also reduce albedo,

Only when free of ice. In winter they would freeze, and in spring the
thick ice cover would stay frozen and low albedo long after the light
dusting of dry snow on land has thawed away.

water erosion slowly carving the hemisphere into a dissected
plateau.

Isaac Kuo

.

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