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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. |
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. |
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.. |
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? |
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. |
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 |
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. |
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. |
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 |
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. |
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 :-) |
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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. :) |
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. |
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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 |
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! |
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. |
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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. :-) |
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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. |
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. |
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? |
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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. :) |
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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. |
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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. |
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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. |
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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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