> I heard the same thing.  In about 20,000 years, our star in its orbit 
> around the galactic center will supposedly enter a relatively 
> high-density molecular cloud.  This will supposedly wreck havoc with our 
> biosphere and climate in very unpleasant ways. 
More importantly, in a year or two we enter a dust-cloud from a large
comet which is expected to cause problems for some (possibly many)
satellites due to dust impacts and electrical conductivity; I've forgotten
where I read this recently (probably comp.risks), but I'll let you know if
I find out. Apparently it's a regular occurence with this comet, but last
time we passed through the cloud was before Sputnik. 
	Mark
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