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Re: KEO
At 11:35 AM 9/14/2002, Peter Guelzow wrote:
>Amazing how much money they were able to get together for such
>a passive satellite..
I agree, but I would say it more strongly. KEO is the stupidest project
I've heard about in a great many years.
Obviously a child of the "art" community. Their theory is that in 50,000
years, the satellite will reenter, INTACT, and humans will be able to read
the CDs. They present no scientific (engineering) basis for the notion
that their satellite will reenter intact, but of course even if it does,
the most likely scenario is that it will fall into an ocean, and be
lost. If it falls on land, will the GLASS CDs be intact? Seems more
likely that they will be melted, vaporized, or shattered. What utter
nonsense.
For a break from the hum drum, read some of the drivel on the www.keo.org
web site, such as ...
Why does KEO have wings?
Purely for symbolic reasons is KEO adorned with two big wings. This
image will appeal to the human imagination as a mythical figure of a bird
that is the messenger of the people of the 21st century.
If KEO is a passive satellite, how can it flutter its wings?
To allow its wings to flutter, KEO uses a leading-edge technology "shape
memory alloys". These are metallic alloys that are able to assume different
shapes according to different temperature ranges and revert to their
original shapes each time they are brought back under their original
temperature.
In this case, the difference in temperature between shadow and sunlight is
exploited, so that during its orbit around Earth, KEO will spread its wings
when it is touched by the sun's rays and fold them when it re-enters the
Earth's shadow. Therefore, no form of energy is needed to make KEO's wings
function.
Warning: YOu will not find any technical data on their web site.
There is a fair chance that the whole thing is a scam. Anybody see audited
financial reports? I don't.
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