Re: Comet impact in the Eastern United States - Feasibility of Evacuation

In article <Xns9A5C70175CAA9genewardsmithsbcglob@[EMAIL PROTECTED]
>,
Gene Ward Smith  <gene@[EMAIL PROTECTED]
> wrote:
>David T. Bilek <davidbilek@[EMAIL PROTECTED]
> wrote in 
>news:iic8t3llgee15ileg6duflh4ckp6dlqidh@[EMAIL PROTECTED]
>
>> Couldn't we manage the sun's brightening relatively easily,
>> particularly at the tech levels we would (presumably) have attained by
>> the time it becomes a problem?  
>
>It would get progressively harder. But what's a good way of getting a
reverse 
>greenhouse barrier in place? Sounds like the germ of an sf plot.

	You could put a mirror at the Earth-Sun L1 but eventually
the Sun will be close enough to 1AU in diameter that friction could
be a problem (Although I think there's evidence of at least one planet
that survived its star's red giant phase despite having been close enough
to have been within the outer parts of the star. I will look this up
later). 

	Moving the Earth by transfering momentum between the Earth,
an asteroid and Jupiter seems only horrifically difficult. 

	

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