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Chuck Gould February 22nd 07 03:38 PM

Nautical word...
 
In the interest of sustaining this worthwhile feature in the NG, I
offer:

barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.

( above definition by Lenfestey/Lenfestey)

The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


Jim February 22nd 07 04:13 PM

Nautical word...
 
How would a boat's displacement be affected floating at the closest possible
proximity to the barycenter vs. the boat being positioned 180 degrees from
the barycenter? (Assuming there is water to float on at those points)

"Chuck Gould" wrote in message
ups.com...
In the interest of sustaining this worthwhile feature in the NG, I
offer:

barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.

( above definition by Lenfestey/Lenfestey)

The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.




Calif Bill February 22nd 07 06:20 PM

Nautical word...
 

"Chuck Gould" wrote in message
ups.com...
In the interest of sustaining this worthwhile feature in the NG, I
offer:

barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.

( above definition by Lenfestey/Lenfestey)

The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


It is defined as the Center of Mass of a System, not the center of
rotation..



Wayne.B February 22nd 07 06:26 PM

Nautical word...
 
On 22 Feb 2007 07:38:11 -0800, "Chuck Gould"
wrote:

In the interest of sustaining this worthwhile feature in the NG, I
offer:

barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.

( above definition by Lenfestey/Lenfestey)

The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


Logic tells me that the barycenter must be constantly moving to match
the current location of the moon.

Is that correct?


Chuck Gould February 22nd 07 07:45 PM

Nautical word...
 
On Feb 22, 10:26�am, Wayne.B wrote:
On 22 Feb 2007 07:38:11 -0800, "Chuck Gould"

wrote:
In the interest of sustaining this worthwhile feature in the NG, I
offer:


barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational *attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from *their
revolutions around the barycenter.


( above definition by Lenfestey/Lenfestey)


The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


Logic tells me that the barycenter must be constantly moving to match
the current location of the moon.

Is that correct?


My logic would agree with your logic, but I'm not completely informed
about all of the specific characteristics.


Chuck Gould February 22nd 07 07:50 PM

Nautical word...
 
On Feb 22, 10:20�am, "Calif Bill" wrote:
"Chuck Gould" wrote in message

ups.com...

In the interest of sustaining this worthwhile feature in the NG, I
offer:


barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational *attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from *their
revolutions around the barycenter.


( above definition by Lenfestey/Lenfestey)


The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


It is defined as the Center of Mass of a System, not the center of
rotation..


In a sense it is also a center of rotation, of the combined masses.

Here's a link to a site that offers a free "gravity simulator" that
demonstrates
celestial bodies rotating around a common barycenter. I wasn't sure I
wanted to download the required program to view it:

http://www.orbitsimulator.com/gravit...arycenter.html


Short Wave Sportfishing February 22nd 07 08:13 PM

Nautical word...
 
Wayne.B wrote:
On 22 Feb 2007 07:38:11 -0800, "Chuck Gould"
wrote:

In the interest of sustaining this worthwhile feature in the NG, I
offer:

barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.

( above definition by Lenfestey/Lenfestey)

The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


Logic tells me that the barycenter must be constantly moving to match
the current location of the moon.

Is that correct?


No. It induces a wobble in the larger object. That's how NASA, Ames
and JPL do those extra solar planet searches with the Spitzer X-Ray and
Hubble telescopes - they look for the star wobble and aim for where the
planet should be based on the arc of the wobble.

The barycenter is the barycenter - the center of mass of any system of
objects.

Center of gravity is another whole subject.

Calif Bill February 22nd 07 10:11 PM

Nautical word...
 

"Chuck Gould" wrote in message
ups.com...
On Feb 22, 10:20?am, "Calif Bill" wrote:
"Chuck Gould" wrote in message

ups.com...

In the interest of sustaining this worthwhile feature in the NG, I
offer:


barycenter (n): A theoretical point 810 miles below the surface of
planet Earth. This point is the rotational center of the Earth and
Moon. The gravitational attraction between Earth and Moon affect the
oceans and their tides; centrifugal forces result from their
revolutions around the barycenter.


( above definition by Lenfestey/Lenfestey)


The barycenter is a definite consideration when examining the physics
of tides, particularly the standing wave on the side of Earth opposite
the position of the moon.


It is defined as the Center of Mass of a System, not the center of
rotation..


In a sense it is also a center of rotation, of the combined masses.

Here's a link to a site that offers a free "gravity simulator" that
demonstrates
celestial bodies rotating around a common barycenter. I wasn't sure I
wanted to download the required program to view it:

http://www.orbitsimulator.com/gravit...arycenter.html


More like the center of rotation in regards to an outside object. A NEO
Near Earth Object ie. asteroid would use the center of mass in it's path for
a center of gravity. If it was the center of rotation of the earth and
moon, we would be traveling like a corkscrew in our path around the moon. A
fairly large corkscrew. Since the earth is about 8000 miles diameter, the
center of rotation as you describe it being 810 miles from the surface, you
would have an about 3200 mile diameter corkscrew.



JimH February 22nd 07 11:21 PM

Nautical word...
 

"Chuck Gould" wrote in message
ups.com...
In the interest of sustaining this worthwhile feature in the NG.....



Here are several online nautical word/phrase dictionaries, one that even
offers a nautical word of the day:

http://www.geocities.com/cjstein_2000/dictionary.html

http://www.seatalk.info/

http://www.marinewaypoints.com/learn...glossary.shtml




Wayne.B February 23rd 07 01:11 AM

Nautical word...
 
On Thu, 22 Feb 2007 20:13:10 GMT, Short Wave Sportfishing
wrote:

No. It induces a wobble in the larger object. That's how NASA, Ames
and JPL do those extra solar planet searches with the Spitzer X-Ray and
Hubble telescopes - they look for the star wobble and aim for where the
planet should be based on the arc of the wobble.

The barycenter is the barycenter - the center of mass of any system of
objects.


I understand your point if taking a distant view from outer space.

At close range however the moon is revolving around the earth, and the
earth is spinning on its axis. That says to me that the geographic
position of the barycenter is constantly shifting with respect to the
earth's surface.


Eisboch February 23rd 07 01:33 AM

Nautical word...
 

"Wayne.B" wrote in message
...


I understand your point if taking a distant view from outer space.

At close range however the moon is revolving around the earth, and the
earth is spinning on its axis. That says to me that the geographic
position of the barycenter is constantly shifting with respect to the
earth's surface.


"It" doesn't shift. It's just never in the same place.

Eisboch :-)



Short Wave Sportfishing February 23rd 07 01:42 AM

Nautical word...
 
Wayne.B wrote:
On Thu, 22 Feb 2007 20:13:10 GMT, Short Wave Sportfishing
wrote:

No. It induces a wobble in the larger object. That's how NASA, Ames
and JPL do those extra solar planet searches with the Spitzer X-Ray and
Hubble telescopes - they look for the star wobble and aim for where the
planet should be based on the arc of the wobble.

The barycenter is the barycenter - the center of mass of any system of
objects.


I understand your point if taking a distant view from outer space.

At close range however the moon is revolving around the earth, and the
earth is spinning on its axis. That says to me that the geographic
position of the barycenter is constantly shifting with respect to the
earth's surface.


Hmmmm - I guess you could put it that way in terms of geography. You
could also say that the Earth is spinning around the barycenter.

For example, it you had two bodies on the same plane orbiting each
other, the barycenter is located in space between the two - it doesn't
move as long as the masses are balanced by the mechanical motion.

Or take another case. Say you have a large rotating body around which a
smaller, but massive body rotates. The barycenter is just above the
surface of the larger body. The barycenter never changes position - it
is the balance point, but the structure below it changes.

Good God, I haven't worked with these concepts in ages. I have a
headache. :)

Chuck Gould February 23rd 07 03:28 AM

Nautical word...
 
On Feb 22, 3:21?pm, "JimH" wrote:
"Chuck Gould" wrote in message

ups.com...

In the interest of sustaining this worthwhile feature in the NG.....


Here are several online nautical word/phrase dictionaries, one that even
offers a nautical word of the day:

http://www.geocities.com/cjstein_2000/dictionary.html

http://www.seatalk.info/

http://www.marinewaypoints.com/learn...glossary.shtml




The purpose of the NG isn't to come up with astonishing content that
can't be found anywhere else in the world, it's to kick around ideas
(not personalities) for discussion.


Wayne.B February 23rd 07 03:33 AM

Nautical word...
 
On Fri, 23 Feb 2007 01:42:23 GMT, Short Wave Sportfishing
wrote:

Good God, I haven't worked with these concepts in ages. I have a
headache. :)


Sorry I made your head spin.

But wait, it was already spinning...

No sympathy here. I've been reading Isaac Asimov's "Asimov on
Physics" in my spare time. It is an incredibly lucid and readable
account of some very esoteric concepts. Published in 1976 but
available used on Amazon.

http://www.amazon.com/Asimov-Physics.../dp/0380418487



JimH February 23rd 07 03:43 AM

Nautical word...
 

"Chuck Gould" wrote in message
oups.com...
On Feb 22, 3:21?pm, "JimH" wrote:
"Chuck Gould" wrote in message

ups.com...

In the interest of sustaining this worthwhile feature in the NG.....


Here are several online nautical word/phrase dictionaries, one that even
offers a nautical word of the day:

http://www.geocities.com/cjstein_2000/dictionary.html

http://www.seatalk.info/

http://www.marinewaypoints.com/learn...glossary.shtml




The purpose of the NG isn't to come up with astonishing content that
can't be found anywhere else in the world, it's to kick around ideas
(not personalities) for discussion.


If you took my reply personally that is your problem. I was only trying to
help you and the NG with other resources on how to locate "nautical words of
the day".

Don't take things so personally Chuck..............breath
in.............breath out................breath
in..............(repeat).....

Have a nice night Chuck!



Reginald P. Smithers III February 23rd 07 04:43 AM

Nautical word...
 
Chuck Gould wrote:
On Feb 22, 3:21?pm, "JimH" wrote:
"Chuck Gould" wrote in message

ups.com...

In the interest of sustaining this worthwhile feature in the NG.....

Here are several online nautical word/phrase dictionaries, one that even
offers a nautical word of the day:

http://www.geocities.com/cjstein_2000/dictionary.html

http://www.seatalk.info/

http://www.marinewaypoints.com/learn...glossary.shtml




The purpose of the NG isn't to come up with astonishing content that
can't be found anywhere else in the world, it's to kick around ideas
(not personalities) for discussion.

Chuck,
Now that we have those 3 links, we no longer need to discuss boating in
the NG.

Wayne.B February 23rd 07 04:48 AM

Nautical word...
 
On 22 Feb 2007 19:28:27 -0800, "Chuck Gould"
wrote:

it's to kick around ideas
(not personalities) for discussion.


Thanks.

My personality has been kicked around enough already.

:-)


Chuck Gould February 23rd 07 09:21 AM

Nautical word...
 
On Feb 22, 8:43?pm, "Reginald P. Smithers III" "remove
wrote:
Chuck Gould wrote:
On Feb 22, 3:21?pm, "JimH" wrote:
"Chuck Gould" wrote in message


roups.com...


In the interest of sustaining this worthwhile feature in the NG.....
Here are several online nautical word/phrase dictionaries, one that even
offers a nautical word of the day:


http://www.geocities.com/cjstein_2000/dictionary.html


http://www.seatalk.info/


http://www.marinewaypoints.com/learn...glossary.shtml


The purpose of the NG isn't to come up with astonishing content that
can't be found anywhere else in the world, it's to kick around ideas
(not personalities) for discussion.


Chuck,
Now that we have those 3 links, we no longer need to discuss boating in
the NG.- Hide quoted text -

- Show quoted text -


That's a frequently recurring theme. The value of Google or other
search engines is to locate sources of often conflicting information.
The value of a NG, (IMO) is to create a place where people can discuss
and debate ideas that relate to the topic, share personal experiences,
etc. The NG would be a very frustrating format for anybody who felt
their only purpose was to extract an enormous amount of general
information, and I agree with JimH, Shortwave, and others that there's
no shortage of free information already circulating on nearly any
conceivable subject. Much of that free information is worth exactly
the selling price.


Chuck Gould February 23rd 07 09:27 AM

Nautical word...
 
On Feb 22, 7:43�pm, "JimH" wrote:


If you took my reply personally that is your problem. *I was only trying to
help you and the NG with other resources on how to locate "nautical words of
the day".



I didn't, so I have no problem.

The nautical word item seems to generate quite a bit of on-topic
discussion, doesn't it? I'll bet that's pretty surprising to somebody
who wrote that the original nautical word posting was a "joke that
everybody else got except you."

Life is full of surprises. Some of them pleasant.





Short Wave Sportfishing February 23rd 07 01:07 PM

Nautical word...
 
Wayne.B wrote:
On Fri, 23 Feb 2007 01:42:23 GMT, Short Wave Sportfishing
wrote:

Good God, I haven't worked with these concepts in ages. I have a
headache. :)


Sorry I made your head spin.

But wait, it was already spinning...

No sympathy here. I've been reading Isaac Asimov's "Asimov on
Physics" in my spare time. It is an incredibly lucid and readable
account of some very esoteric concepts. Published in 1976 but
available used on Amazon.

http://www.amazon.com/Asimov-Physics.../dp/0380418487


It's in my library - autographed no less. :)

Did I ever tell you the story of how I met him?

Short Wave Sportfishing February 23rd 07 01:07 PM

Nautical word...
 
Wayne.B wrote:
On 22 Feb 2007 19:28:27 -0800, "Chuck Gould"
wrote:

it's to kick around ideas
(not personalities) for discussion.


Thanks.

My personality has been kicked around enough already.

:-)


I don't have a personality. :)

Harry Krause February 23rd 07 02:43 PM

Nautical word...
 
Short Wave Sportfishing wrote:
Wayne.B wrote:
On 22 Feb 2007 19:28:27 -0800, "Chuck Gould"
wrote:

it's to kick around ideas
(not personalities) for discussion.


Thanks.

My personality has been kicked around enough already.

:-)


I don't have a personality. :)



Hmmmm.

Wayne.B February 23rd 07 02:50 PM

Nautical word...
 
On Fri, 23 Feb 2007 13:07:10 GMT, Short Wave Sportfishing
wrote:

http://www.amazon.com/Asimov-Physics.../dp/0380418487


It's in my library - autographed no less. :)

Did I ever tell you the story of how I met him?


No, please do, one of my childhood heros just to show how geeked up I
was.


Short Wave Sportfishing February 23rd 07 04:17 PM

Nautical word...
 
Wayne.B wrote:
On Fri, 23 Feb 2007 13:07:10 GMT, Short Wave Sportfishing
wrote:

http://www.amazon.com/Asimov-Physics.../dp/0380418487

It's in my library - autographed no less. :)

Did I ever tell you the story of how I met him?


No, please do, one of my childhood heros just to show how geeked up I
was.


Just to set the scene:

My Father was a good friend of Clifford Simak who he met through his
work at Hearst newspapers. At one time, he almost went with Simak to the
Minneapolis Tribune, but stayed in Milwaukee.

Anyway, we had moved east when the two newspapers merged in Milwaukee.
One day, when I was a junior in highschool, big time scifi geek, I came
home after baseball practice and there sitting in the living room with
some beer and munchies is my Dad, Clifford Simak and Issac Asimov. They
were both in town for some writing symposium at Boston University.

For probably the only time in my life, I was speechless. :) Two of my
scifi heros sitting right in my livingroom. One I already knew and had
talked to before, but man, THAT'S ISSAC ASIMOV!! :)

And I must add that he was very gracious and made me very comfortable as
I was obviously awed. And he spent some time talking to me about the
books and completely floored me when he asked about my interests, my
boat, sports...it was incredible.

Unfortunately, I had to leave for an AAU game and was only home to get
my uniform and grab a sandwich. And I also have a letter he wrote me
replying to a question I had about the Foundation series - framed.

Wayne.B February 23rd 07 05:08 PM

Nautical word...
 
On Fri, 23 Feb 2007 16:17:08 GMT, Short Wave Sportfishing
wrote:

For probably the only time in my life, I was speechless. :) Two of my
scifi heros sitting right in my livingroom. One I already knew and had
talked to before, but man, THAT'S ISSAC ASIMOV!! :)


Very cool.

Unfortunately he never had any compelling reason to visit my old home
town in the snowbelt of upstate NY. :-)



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