Re: The Physics Behind 'Contractions'.

On Fri, 2 Jan 2009 00:54:37 -0800 (PST), Jerry <Cephalobus_alienus@xxxxxxxxxxx>
wrote:

On Dec 31 2008, 4:28 pm, hw@..(Dr. Henri Wilson) wrote:

Let me explain again..... read carefully.
If a space telescope is sent into a circular ecliptic orbit and is accurately
aligned with a star that lies right on the ecliptic polar axis and if that
telescope spins on a similarly aligned axis once per its orbit period, the
image of that star will remain exactly in the viewing centre.

(sigh)
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Your description of your proposal is ambiguous, but no matter how
it is interpreted, IT DOESN'T WORK.

You got it all wrong.
My telescope is actually orbiting the SUN not the Earth....but if you want it
to orbit the Earth as it goes then a small diurnal aberration will show up.

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If a space telescope in a circular 96 minute ecliptic orbit
around the Earth is pointed at a precise right angle to its orbit,
then a star on the ecliptic polar axis will be displaced 20.5"
from the viewing center of the telescope due to Earth's orbit
around the Sun, plus 5.2" IN A VECTOR SUM due to the scope's
orbit around the Earth.
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If by the words, "similarly aligned axis", you mean orienting
the telescope's rotational axis at a precisely right angle to
the orbital plane, you will observe the following:

If you rotate the telescope about the ecliptic polar axis once
every 96 minutes, the Ecliptic Pole Star will remain in
APPROXIMATELY the same position in the viewing field (except for
a 23.5 mas "creep" per orbit due to Earth's orbit around the
Sun), but all the stars in the viewing field will be spinning
around the Ecliptic Pole Star every 96 minutes. This is not good
for astrophotography.

If the telescope is rotated once per year, you wont get the creep.

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If by the words, "similarly aligned axis", you mean orienting
the telescope's rotational axis so that the star appears in the
precise center of the telescope's viewing field (taken to be
aligned with the rotational axis), you will observe the following:

Centering the telescope on the Ecliptic Pole Star requires
tilting the telescope 5.2" in the direction of the telescope's
orbit around the Earth plus 20.5" in the direction of Earth's
orbit around the Sun. 48 minutes later, the telescope will be
tilted OPPOSITE to its orbit around the Earth, and no rotation of
the telescope about the tilt axis will be capable of returning
the Ecliptic Pole Star to a central position in the view field.
Plus, the "creep" of 23.5 mas per Earth orbit remains uncorrected.

The telescope is made to rotate 1 + (1/365.25) turns per Earth orbit.

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No matter how one interprets it, your proposal is WORTHLESS.

It is simple and straightforward. You simply haven't cottoned on yet.
I'll simplify it.

If you fasten a telescope to the edge of a bloody big spinning flywheel and
point it at the knob on the end of its central shaft 100 LYs away, the image
wont move in the viewing window. The aberration remains constant all the way
around.

- knob
|
|
/____|____ spinning wheel

All other objects in the field of view will appear to move around the knob, in
differently sized circles. Aberration is present but the angle remains the same
for all of them.
Any RELATIVE MOVEMENT between all viewed objects is due to parallax alone.


Get it now?

Jerry




Henri Wilson. ASTC,BSc,DSc(T)

www.users.bigpond.com/hewn/index.htm.

......
.

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