A few years ago I was touring the Jet Propulsion Lab and they
showed me a prototype of the Hubble Space Telescope. "Pretty
cool machine,guys," I said, "but is there anyway us amateur
astronomers can get in on this kind of action?" They said yes,
plans for the HST were available through the gift shop. "How
much?" I asked. They said "Fifty." I said "Great! Here's my
American Express Plutonium Card!"
I picked up the plans and went home, happy as a clam, until I got
my American Express bill. The total amount due was $50,119.00!
I figured the $119 must have been from one of these Northwest
student ticket vouchers, but where was that $50,000 from? Only
then did I realize that JPL had charged me, not fifty dollars,
but fifty THOUSAND dollars. Boy was I mad. But it was too late
to return the plans and get my fifty thousand dollars back, so
I just chalked it up to experience. But now I'm getting my
revenge... I asked the folks at the JPL copyright office if I
could give the plans out to all my friends and they said,
"Heck, why not? What do we need with royalties? Tell the
world!" So I've written up the key steps here. Please post
them to every bboard you can think of and mail them to all your
friends. Remember, if you break the chain you'll get seven
years of bad sunspot interference.
You will need:
1 launch vehicle.
126 "Master Constructor" Erector Sets(tm).
1 Radio Shack(tm) Pro-2001 scanner.
1 2-meter block of glass.
1 box of aluminum foil.
4 sheets of #20 (coarse) sandpaper.
4 sheets of #150 (fine) sandpaper.
2 children's magnifying glasses.
(optional) filters and instrumentation as needed.
Instructions:
1. Using the erector sets, construct a superstructure capable of supporting a 2-meter mirror and whatever instrumentation you will
be using. Make sure that the superstructure can survive the
G-forces during launch. Don't be tempted to skimp on the nuts
and bolts here.
2. Using the #20 sandpaper, grind the block of glass until it
takes on the shape of a convex mirror. Be very careful in this
step because if you get the shape wrong you'll have to start
over again. Use the #150 sandpaper to smooth out any
irregularities and fix any minor problems with the focus. Then
melt the aluminum foil and vacuum deposit 1-2 atomic layers of
aluminum on the surface of the mirror. Mount the mirror in its
place in the superstructure.
3. Mount the children's magnifying glasses at the focal point of
the mirror. These will serve as an eyepiece for your
instruments.
4. Open the back of the Pro-2001 scanner. There will be a
16-pin chip on the upper left of the circuit board labelled
1Y1169AV. Carefully clip out the fourth pin on the left and
remove it from the chip. This will convert your Pro-2001
scanner into the much more expensive Pro-2010 scanner with
orbital transceiver capabilities. Close the back of the
scanner, check that the batteries are in place, mount it in the
superstructure, and connect it to your instruments.
5. Make one last check of everything and you're ready to launch!
This is a true story, every bit of it, I swear on my father's
sister's grave. Even if it isn't, I hope that you get as much
use and enjoyment out of your home-built Hubble Space Telescope
as I have from mine!
Comment from a System Manager at the Space Telescope Science
Institute (which didn't _build_ the Hubble, but operates it):
Hmm. Got the instructions for the mirror wrong.