moon's rotation

"beav" wrote in message
...
On Sun, 11 Dec 2005 10:12:55 -0500, "John Zinni"
wrote:

"Ryan Evans" wrote in message
...
Do we always see the same side of the moon, or does it slowly rotate
in relation to our view?

To me, it seems quite a cooincidence that the moon rotates perfectly
such that we see the same side constantly.

RE

No coincidence. In fact it's quite common.

It's called 1-to-1 spin-orbit resonance.


"Most of the moons in the solar system are similarly locked by the tidal
fields of their parent planets."
http://physics.fortlewis.edu/Astrono...ML/AT30803.HTM

"All the large moons in our Solar System are in 1:1 spin-orbit resonances:
Those moons always show the same side to the planet, just like our Moon
does
relative to the Earth."
http://www.astro.uu.nl/~strous/AA/en...rtekracht.html


Question: What major solar system object is locked into a spin-orbit
resonance with its primary that is other than 1-to-1?


answer neptune and pluto?

actually, you could include any asteroid or KBO at the respective
Langrange regions away from any planet, especially the ones at 2:3 and
2:5 resonances...

BZZZZZZZZT! Sorry wrong answer.

(Actually, I think you may be thinking of a different kind of resonance
(orbit-orbit). My question was specifically about spin-orbit resonance -
rotations of the secondary in relation to orbits of the primary)




me? i've personally revoked pluto's license to be a planet...

"Ryan Evans" wrote in message
...
Do we always see the same side of the moon, or does it slowly rotate
in relation to our view?

To me, it seems quite a cooincidence that the moon rotates perfectly
such that we see the same side constantly.

RE


The ever so elusive Aliens who reside on the "Dark Side of the Moon" (still
the best album, ever) synchronized the moon so that we only see one side.
They built huge terminals to dock their spaceships on the dark side. There
is also a variety of Taco and Pizza joints there. Since it is so cold, their
preferred way of drinking beer is "warmed" to just above the solidifying
point of water (appr. 42F). The Rolling Stones are whisked there quite
often by the Aliens, which explains their wrinkled faces, i.e. prolonged
exposure to -280F. Mick says he's getting too old for that **** and wants
Pink Floyd to play the next moon-gig, after all, they immortalized the "Far
Side", as it was known to heathens and believers alike, by renaming it to
"The Dark Side", a term the Aliens still haven't quite come to terms with.

One of the Apollo astronauts orbiting in the docking module, reported seeing
shiny metallic flashes on the dark side scooting across the surface. Well,
those were Pizza delivery vehicles, made of polished Titanium.

Hope this answers your question.

John Zinni wrote:
"beav" wrote in message
...
On Sun, 11 Dec 2005 10:12:55 -0500, "John Zinni"
wrote:

"Ryan Evans" wrote in message
...
Do we always see the same side of the moon, or does it slowly rotate
in relation to our view?

To me, it seems quite a cooincidence that the moon rotates perfectly
such that we see the same side constantly.

RE

No coincidence. In fact it's quite common.

It's called 1-to-1 spin-orbit resonance.


"Most of the moons in the solar system are similarly locked by the tidal
fields of their parent planets."
http://physics.fortlewis.edu/Astrono...ML/AT30803.HTM

"All the large moons in our Solar System are in 1:1 spin-orbit resonances:
Those moons always show the same side to the planet, just like our Moon
does
relative to the Earth."
http://www.astro.uu.nl/~strous/AA/en...rtekracht.html


Question: What major solar system object is locked into a spin-orbit
resonance with its primary that is other than 1-to-1?


answer neptune and pluto?

actually, you could include any asteroid or KBO at the respective
Langrange regions away from any planet, especially the ones at 2:3 and
2:5 resonances...

BZZZZZZZZT! Sorry wrong answer.

(Actually, I think you may be thinking of a different kind of resonance
(orbit-orbit). My question was specifically about spin-orbit resonance -
rotations of the secondary in relation to orbits of the primary)




me? i've personally revoked pluto's license to be a planet...



"It [Mercury] is in a gravitational resonance, but one in which its
axial rotation period is about 58.6 Earth days, or two thirds of its
orbital rotation period."

http://www.daviddarling.info/encyclo...ercuryrot.html

Double-A

"Double-A" wrote in message
oups.com...

John Zinni wrote:
"beav" wrote in message
...
On Sun, 11 Dec 2005 10:12:55 -0500, "John Zinni"
wrote:

"Ryan Evans" wrote in message
...
Do we always see the same side of the moon, or does it slowly rotate
in relation to our view?

To me, it seems quite a cooincidence that the moon rotates perfectly
such that we see the same side constantly.

RE

No coincidence. In fact it's quite common.

It's called 1-to-1 spin-orbit resonance.


"Most of the moons in the solar system are similarly locked by the
tidal
fields of their parent planets."
http://physics.fortlewis.edu/Astrono...ML/AT30803.HTM

"All the large moons in our Solar System are in 1:1 spin-orbit
resonances:
Those moons always show the same side to the planet, just like our Moon
does
relative to the Earth."
http://www.astro.uu.nl/~strous/AA/en...rtekracht.html


Question: What major solar system object is locked into a spin-orbit
resonance with its primary that is other than 1-to-1?


answer neptune and pluto?

actually, you could include any asteroid or KBO at the respective
Langrange regions away from any planet, especially the ones at 2:3 and
2:5 resonances...

BZZZZZZZZT! Sorry wrong answer.

(Actually, I think you may be thinking of a different kind of resonance
(orbit-orbit). My question was specifically about spin-orbit resonance -
rotations of the secondary in relation to orbits of the primary)




me? i've personally revoked pluto's license to be a planet...



"It [Mercury] is in a gravitational resonance, but one in which its
axial rotation period is about 58.6 Earth days, or two thirds of its
orbital rotation period."

http://www.daviddarling.info/encyclo...ercuryrot.html

Double-A

Give that man a Cupie-Doll!!!

Yes it's Mercury that is captured into a 3:2 spin-orbit resonance around the
Sun (rotating three times for every two revolutions around the Sun).

Contributing factors in allowing this 3:2 spin-orbit resonance to be stable
are Mercury's permanent bulge and its orbital eccentricity.

Twittering One wrote:
"The clock stands still,
The clock stands still,

Stands tall against the wall,
Standing still and tall,

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

Tick tock, tick tock,
Tick tock, tick tock.

One o'clock, two o'clock,
Three o'clock, four o'clock.

While the hands of the clock go round
And around
And make no sound

But chant ...

'I'm a little cuckoo clock.
Tick tock, tick tock.'

The clock stands still,
The clock stands still.

One o'clock, two o'clock,
Three o'clock, four o'clock.

The cuckoo pops out,
Says,

'Stop ~ !
What time is it ~ ?'

The hands of the clock go round
And around and tick
And tock their enchantment's tick
Tock sound ...

'Tick tock, tick tock.
Tick tock, tick tock.

It's one o'clock.
Cuckoo ~ !'

The hands of the clock go round
And around and tock
Back, to say ~

'Tick tock, tick tock.
Stop ~ !

What time is it ~ ?
It was two o'clock
Before, an hour ago, how can you say
It's only now one o'clock ~ ?'

The cuckoo pops out,
Says,

'Cuckoo ~ ! Cuckoo ~ !

Five o'clock, six o'clock, seven o'clock,
Eight o'clock,

Tick tock, tick tock,
I'm a little cuckoo, but I can tock ~
Tick tock, tick tock.'

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

'Stop ~ !
What time is it ~ ?'

Nine o'clock, ten o'clock, eleven o'clock,
Twelve o'clock

Ticks the clock
While the hands go round
While the hands of the clock go round
And around

And the cuckoo pops out
Again ~

'Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

Tick tock
Cuckoo ~ !

I make the Thyme,
You must obey ~ !

I sing out the Thyme,
You must hear what I say,
You must obey,
You must dance my ticking tune
To light of a silver moon ~ !

Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

The Thyme tocks
Whatever I say ticks

Even if a candle's wick
Lights both ends

And the wind blows
A far away chime ~ !'"
~ White Chalk


"Time has come today [for Tookie Williams]
Young hearts can go their way
Can't put it off another day
I don't care what others say
They say we don't listen anyway
Time has come today
(Hey)

Oh
The rules have changed today (Hey)
I have no place to stay (Hey)
I'm thinking about the subway (Hey)
My love has flown away (Hey)
My tears have come and gone (Hey)
Oh my Lord, I have to roam (Hey)
I have no home (Hey)
I have no home (Hey)

Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by the tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x11]

Oh
Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x4]
Yeah"
~The Cambers Brothers

Hey!
~Double-A

Take that mans Cupie-Doll away again for responding to and posting such
mindless drivel!!!


--

"Double-A" wrote in message
ups.com...

Twittering One wrote:
"The clock stands still,
The clock stands still,

Stands tall against the wall,
Standing still and tall,

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

Tick tock, tick tock,
Tick tock, tick tock.

One o'clock, two o'clock,
Three o'clock, four o'clock.

While the hands of the clock go round
And around
And make no sound

But chant ...

'I'm a little cuckoo clock.
Tick tock, tick tock.'

The clock stands still,
The clock stands still.

One o'clock, two o'clock,
Three o'clock, four o'clock.

The cuckoo pops out,
Says,

'Stop ~ !
What time is it ~ ?'

The hands of the clock go round
And around and tick
And tock their enchantment's tick
Tock sound ...

'Tick tock, tick tock.
Tick tock, tick tock.

It's one o'clock.
Cuckoo ~ !'

The hands of the clock go round
And around and tock
Back, to say ~

'Tick tock, tick tock.
Stop ~ !

What time is it ~ ?
It was two o'clock
Before, an hour ago, how can you say
It's only now one o'clock ~ ?'

The cuckoo pops out,
Says,

'Cuckoo ~ ! Cuckoo ~ !

Five o'clock, six o'clock, seven o'clock,
Eight o'clock,

Tick tock, tick tock,
I'm a little cuckoo, but I can tock ~
Tick tock, tick tock.'

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

'Stop ~ !
What time is it ~ ?'

Nine o'clock, ten o'clock, eleven o'clock,
Twelve o'clock

Ticks the clock
While the hands go round
While the hands of the clock go round
And around

And the cuckoo pops out
Again ~

'Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

Tick tock
Cuckoo ~ !

I make the Thyme,
You must obey ~ !

I sing out the Thyme,
You must hear what I say,
You must obey,
You must dance my ticking tune
To light of a silver moon ~ !

Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

The Thyme tocks
Whatever I say ticks

Even if a candle's wick
Lights both ends

And the wind blows
A far away chime ~ !'"
~ White Chalk


"Time has come today [for Tookie Williams]
Young hearts can go their way
Can't put it off another day
I don't care what others say
They say we don't listen anyway
Time has come today
(Hey)

Oh
The rules have changed today (Hey)
I have no place to stay (Hey)
I'm thinking about the subway (Hey)
My love has flown away (Hey)
My tears have come and gone (Hey)
Oh my Lord, I have to roam (Hey)
I have no home (Hey)
I have no home (Hey)

Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by the tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x11]

Oh
Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x4]
Yeah"
~The Cambers Brothers

Hey!
~Double-A

John Zinni wrote:
Take that mans Cupie-Doll away again for responding to and posting such
mindless drivel!!!


--


Hey, what I posted was a classic hit song from the sixties!

And it mentions the Sun twice (astronomy content)!

Double-A

[rec.music.classical added for classic music conent]


"Double-A" wrote in message
ups.com...

Twittering One wrote:
"The clock stands still,
The clock stands still,

Stands tall against the wall,
Standing still and tall,

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

Tick tock, tick tock,
Tick tock, tick tock.

One o'clock, two o'clock,
Three o'clock, four o'clock.

While the hands of the clock go round
And around
And make no sound

But chant ...

'I'm a little cuckoo clock.
Tick tock, tick tock.'

The clock stands still,
The clock stands still.

One o'clock, two o'clock,
Three o'clock, four o'clock.

The cuckoo pops out,
Says,

'Stop ~ !
What time is it ~ ?'

The hands of the clock go round
And around and tick
And tock their enchantment's tick
Tock sound ...

'Tick tock, tick tock.
Tick tock, tick tock.

It's one o'clock.
Cuckoo ~ !'

The hands of the clock go round
And around and tock
Back, to say ~

'Tick tock, tick tock.
Stop ~ !

What time is it ~ ?
It was two o'clock
Before, an hour ago, how can you say
It's only now one o'clock ~ ?'

The cuckoo pops out,
Says,

'Cuckoo ~ ! Cuckoo ~ !

Five o'clock, six o'clock, seven o'clock,
Eight o'clock,

Tick tock, tick tock,
I'm a little cuckoo, but I can tock ~
Tick tock, tick tock.'

While the hands go round
While the hands of the clock go round
And around
And make no sound

But ...

'Stop ~ !
What time is it ~ ?'

Nine o'clock, ten o'clock, eleven o'clock,
Twelve o'clock

Ticks the clock
While the hands go round
While the hands of the clock go round
And around

And the cuckoo pops out
Again ~

'Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

Tick tock
Cuckoo ~ !

I make the Thyme,
You must obey ~ !

I sing out the Thyme,
You must hear what I say,
You must obey,
You must dance my ticking tune
To light of a silver moon ~ !

Its one o'clock.
Cuckoo ~ ! Cuckoo ~ !

The Thyme tocks
Whatever I say ticks

Even if a candle's wick
Lights both ends

And the wind blows
A far away chime ~ !'"
~ White Chalk


"Time has come today [for Tookie Williams]
Young hearts can go their way
Can't put it off another day
I don't care what others say
They say we don't listen anyway
Time has come today
(Hey)

Oh
The rules have changed today (Hey)
I have no place to stay (Hey)
I'm thinking about the subway (Hey)
My love has flown away (Hey)
My tears have come and gone (Hey)
Oh my Lord, I have to roam (Hey)
I have no home (Hey)
I have no home (Hey)

Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by the tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x11]

Oh
Now the time has come (Time)
There's no place to run (Time)
I might get burned up by the sun (Time)
But I had my fun (Time)
I've been loved and put aside (Time)
I've been crushed by tumbling tide (Time)
And my soul has been psychedelicized (Time)

(Time)
Now the time has come (Time)
There are things to realize (Time)
Time has come today (Time)
Time has come today (Time)

Time [x4]
Yeah"
~The Cambers Brothers

Hey!
~Double-A

Michael Baldwin Bruce wrote:
Bruce and/or Sheila AKA ah wrote:
Ryan Evans wrote:
Do we always see the same side of the moon, or does it slowly rotate
in relation to our view?

To me, it seems quite a cooincidence that the moon rotates perfectly
such that we see the same side constantly.

It was painted that way from the beginning.

How about we moon you and find out?

I have a heart murmurr.
--
ah

"Greg Neill" wrote in message
...
It's not a coincidence. We see the same side because
the Moon's rotation is gravitationally locked to the
Earth.


Have you ever explained this to a non-Astro geek. I have. It's fun to hear
the arguments about how I am wrong about it. LOL.

BV.
www.time2conserve.com

When I'm out set up for Sidewalk Astronomy and someone asks why we see the
same side all the time, I use the simple way of telling them and then they
are happy.

"The moon takes about 29 days to go around the Earth, at the same time it's
spinging on it's own at a rate of One Turn every 29 days. Thus the two go
together so it shows the same face to us all the time.


--

The Lone Sidewalk Astronomer of Rosamond
Telescope Buyers FAQ
http://home.inreach.com/starlord
Astronomy Net Online Gift Shop
http://www.cafepress.com/astronomy_net
In Garden Online Gift Shop
http://www.cafepress.com/ingarden
Blast Off Online Gift Shop
http://www.cafepress.com/starlords




"BenignVanilla" wrote in message
news
"Greg Neill" wrote in message
...
It's not a coincidence. We see the same side because
the Moon's rotation is gravitationally locked to the
Earth.


Have you ever explained this to a non-Astro geek. I have. It's fun to hear
the arguments about how I am wrong about it. LOL.

BV.
www.time2conserve.com