Question: Will a pendulum Keep Swinging when Free Falling.

"Henry Wilson DSc ." HW@.. wrote in message
...
On Wed, 9 Dec 2009 21:52:57 -0000, "Androcles"

wrote:


"Henry Wilson DSc ." HW@.. wrote in message
. ..
On Wed, 9 Dec 2009 21:42:31 -0000, "Androcles"




What has happened to its motion since then?

It was moved out of the way for a super highway, along with the Earth.
http://www.youtube.com/watch?v=MbGNcoB2Y4I

You see, Wilson, they had to stop it turning to measure it up for
the low loader --
http://www.howardporter.com.au/low-loaders.asp
-- based on your advice, of course:
"It would be very unusual to try to measure a moving object. I don't
know of any instances where it is done. Any sane person would stop the
bloody thing then measure it." -- Wilson


Not only do you know no basic celestial mechanics, Wilson,
you know no sci-fi either.

....silly old pommie engineer.....

You should be able to answer this question even when wearing your
tinfoil helmet: Why does Wilson think the Moon spins around some
axis other than its own?

OK, enough of that. Do something useful and look at this
http://www.scisite.info/betalyr.jpg

see also: http://www.student.oulu.fi/~ktikkane/AST/BETALYR.html
or: http://www.student.oulu.fi/~ktikkane/astOLD.html

As you can see, I can roughly match this type of curve. The upward blip in
the
middle of the 'pseudo eclipse' is due to a bright companion star. What do
you
reckon might cause the downward dip in the top half of the curve?


Dim light from the glowing companion planet, although I haven't
modelled it.
Align the major axis with the line of sight so that you get an Algol-type
dip in brightness that Goodricke imagined was an eclipse, although
we now know we can reproduce it with the elliptical orbit almost face-
on and using just one source of light. Now do nothing else but reverse
the direction of the major axis (add 180 to yaw). That's the orbit
of the companion. You'll get an upward spike instead of a downward
dip. When you superimpose the light from both star and companion,
(with a dim companion compared to the main star), the spike will
appear at the bottom of the dip.
Looks to me like the companion is an iron world close to the parent
star and glowing hot from the star's heat. It's big, close because it
has a thirteen day period, and white hot because it is close. You've
found the first true Androcles Cool Heavy, or ACH. :-) Well done.
Tikkanen did a fair job, although earlier he had a student's propensity
to take more data during an "eclipse" than at any other time during
the period. He seems to have overcome that now and provides
data throughout the entire period.
Oh, and one more thing. The companion planet keeps the same
face to the star, so it will not be as bright as the hot side.
Iron doesn't melt until it glows hotter than red as any blacksmith
forging a horseshoe will tell you. When the darker side faces us
there will be a dip in the middle of the bright part of the curve.

On Thu, 10 Dec 2009 00:10:01 -0000, "Androcles"
wrote:


"Henry Wilson DSc ." HW@.. wrote in message
.. .
On Wed, 9 Dec 2009 21:52:57 -0000, "Androcles"

wrote:



OK, enough of that. Do something useful and look at this
http://www.scisite.info/betalyr.jpg

see also: http://www.student.oulu.fi/~ktikkane/AST/BETALYR.html
or: http://www.student.oulu.fi/~ktikkane/astOLD.html

As you can see, I can roughly match this type of curve. The upward blip in
the
middle of the 'pseudo eclipse' is due to a bright companion star. What do
you
reckon might cause the downward dip in the top half of the curve?


Dim light from the glowing companion planet, although I haven't
modelled it.
Align the major axis with the line of sight so that you get an Algol-type
dip in brightness that Goodricke imagined was an eclipse, although
we now know we can reproduce it with the elliptical orbit almost face-
on and using just one source of light. Now do nothing else but reverse
the direction of the major axis (add 180 to yaw). That's the orbit
of the companion. You'll get an upward spike instead of a downward
dip. When you superimpose the light from both star and companion,
(with a dim companion compared to the main star), the spike will
appear at the bottom of the dip.

That's what I did. My program adds the two contributions. It matches the main
dip very well.

Looks to me like the companion is an iron world close to the parent
star and glowing hot from the star's heat. It's big, close because it
has a thirteen day period, and white hot because it is close. You've
found the first true Androcles Cool Heavy, or ACH. :-) Well done.
Tikkanen did a fair job, although earlier he had a student's propensity
to take more data during an "eclipse" than at any other time during
the period. He seems to have overcome that now and provides
data throughout the entire period.

I cannot think of a way to match the broad middle dip though.
The brightness curves of Beta Lyr change considerably too over time. There is a
fair bit of information on this star.

Oh, and one more thing. The companion planet keeps the same
face to the star, so it will not be as bright as the hot side.
Iron doesn't melt until it glows hotter than red as any blacksmith
forging a horseshoe will tell you. When the darker side faces us
there will be a dip in the middle of the bright part of the curve.

Well, that's an effect that I want to include in my program. I think it is
probably very common. Many small companion stars should be in tidal lock
because they are fluid. Note also, their bright side is facing us on the
concave half of their orbit, when brightness increases.


Henry Wilson...www.scisite.info/index.htm

Einstein...World's greatest SciFi writer..