(urth) Green Is Urth Redux

[Jeff Wilson]

On 1/12/2011 11:12 AM, Lee Berman wrote:
>
>
>> Hypothesis 1: Lune is Moon-sized and we can assume there is an unmentioned power source.
>>
>> Hypothesis 2: Lune is Urth-sized and we can assume its forests are maintained by the same power source as
>> Urth's forests- the sun.
>
>
>> Jeff Wilson- Why would the sun shine less brightly on a smaller body than on a larger
>> one?
>
> I don't understand this question. The Sun shines about as brightly on the Moon as on Earth. The main reason
> our Moon doesn't have plants is that it doesn't have an atmosphere. An atmosphere is necessary to provide
> CO2 and 02 of course. But it also provides the possibility of surface water. With 0 atmospheric pressure,
> all water would boil off into space. There is temperature buffering and regulation also.
>
> If Lune is as small as Moon, it needs a technology-based power source to allow plant growth. That's all. If
> Lune is as big as a planet and has an atmosphere, it can have plant growth even if there is no technology
> present to sustain it.

What does the technology-based power source provide that an enclosed 
terrarium could not?

-- 
Jeff Wilson - jwilson at io.com
Computational Intelligence Laboratory - Texas A&M Texarkana
< http://www.tamut.edu/CIL >