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.