posted on Apr, 13 2005 @ 01:10 AM
Titan has an atmosphere that is NH3 & CH4, Ammonia and Methane, as the Early Earth did.
It is about twice the mass of Earth's moon.
It has a larger diameter than mercury (but less than half the mass).
It has a molten core and therefore a magnetic field, which is what protects a planet's atmosphere.
It will have more gravity than the Moon and and an organic (bio-engineerable) atmosphere, unlike Venus with an atmosphere of sulfuric acid and CO2.
If we can engineer bacteria that will do the job of pumping out lots of oxygen as they did here on Earth only at a very accelerated rate it can be
made Very Earth-like, right on the surface.
Earth II, overstates the case, but Titan could be very livable with a breathable atmosphere on its surface.
Currently the surface temperature of Titan is about minus 178 C or minus 289 F, which is the reason for moving it to a warmer orbit.
It would probably have to have a much longer year than the Earth so the orbit of it would have to be just inside or just outside of Earth's orbit. It
is light enough that that should have virtually no effect on the Earth's orbit.
Venus might be terraformable but the entire surface of the planet would have to be replaced or covered with organics and a viable atmosphere
added, probably imported. Right now the pressure on the surface is like being 900 meters deep in our ocean and the temperatures are around 450 C and
the atmosphere is CO2 and sulfuric acid. [can you say 'hostile'?] Venus on the plus side has a warm core/magnetic field to protect an
atmosphere once you get one worth having there.
Mars has no magnetic field left to protect its atmosphere, which is why most of it is now gone. On the plus side you don't have to deal
with deep ocean pressure levels, tremendous heat and sulfuric acid like you would with Venus.
Getting the Core re-moltenized for a magnetic field sounds like an engineering project that wouldn't be do-able for millenia if ever.
If it were possible to re-moltenize a celestial bodies core, that could be tried with the Earth's Moon. It is smaller than Mars so it
wouldn't be as massive a project. Atmospheric gases and additional water would have to be imported, perhaps from Saturn, Jupiter or one of their
moons. It also has a great location.
Of all the planets Titan is the most ready to terraform.
footnote to apc, I don't think the magnetic field of Saturn keeps Titan's core warm. The gravitational tidal friction might contribute to it
[edit on 13-4-2005 by slank]