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Author Topic: Why is the moon moving further away from the Earth?  (Read 77994 times)

Offline common_sense_seeker

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Why is the moon moving further away from the Earth?
« Reply #25 on: 09/09/2008 09:49:50 »
At least some mass then, at least?
 

Offline ZHUYH

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Why is the moon moving further away from the Earth?
« Reply #26 on: 23/09/2008 01:35:50 »
"A newly discovered universal force can help to develop unified theory

SIR-A newly discovered universal force called “Vorticity” can help to develop unified theory, discussed in your essay “Unravelling string theory”(Nature 438, 1085; 2005) The force was first discovered by Mr. Zhu based on a modified Cavendish experiment. I also used Kepler’s third law to independently deduct its formula later. A rotating mass has a vorticity force surrounding it. The force can drive object to move tangentially around a spinning mass. The formula is : KGMmωcosθ/R^2 (K=Vorticity constant=0.4, G=Gravity constant, ω=angular velocity(rev/sec), θ=angle between rotation plane of mass M and m, R=radius). Planetary movement equation is modified to be: GMm/R^2 + KGMmωcosθ/R^2=mRw^2

This new force is a force accompanying Gravity. Vorticity can explain many phenomenons such as Sun’s and Earth’s oblateness, planets’ precession(Earth, Venus, Mercury), Lense-Thirring effect, Pioneers 10 & 11 deceleration, Earth’s rotation deceleration(0.0016sec per hundred year), Moon’s orbit change, solar system’s angular momentum transfer, and planets’ rings and satellites formation. A formula derived from Vorticity can well explain polar orbiting satellites’ precession: Ft=KGqMmωcosθ/R^2 (q=1-ωp/ωe, ωp=satellite orbital revolution velocity, ωe=Earth spinning velocity). Vorticity can also help to solve galaxy rotation problem by modifying virial mass (Mtotal=2(Rtotal*V^2)/(G+KGω), V=galaxy rotation velocity).

Pioneers 10 & 11 are found deceleration. Vorticity can predict the deceleration (one per ten billion of Earth’s gravity:g) by comparing Sun’s Vorticity near Earth to Sun’s Vorticity near Jupiter. Kant’s nebular hypothesis is the mostly widely accepted theory for solar system formation. However, Sun has less angular momentum than the hypothesis indicates. Vorticity can solve this angular momentum discrepancy. Sun transferred its angular momentum to its planets by Vorticity and then Sun’s rotation decelerated. Moon is moving away from Earth because Earth is also transferring its angular momentum to Moon by Vorticity. That is the reason of Earth’s rotation deceleration. The observed distance change (0.03 meter per year) can also be calculated by using Vorticity. (h=365*2GK^2*Mq/π^2*R^2, mgh=1/2*mū^2, ū=1/π∫vsinωtdωt=2at/π, a=KGMω/R^2, ū=daily average velocity of Moon)

The hypothesis that Uranus’ rings and satellites were formed in the beginning of solar system is widely accepted. Uranus’ rings and its satellites’ orbital revolution plane should have been in Sun’s ecliptic plane. An asteroid or comet hit Uranus and made its axial tilt of ninety-eight degree. Vorticity but not Gravity could force Uranus’ rings and satellites to move to the current rotational plane. Vorticity can also explain why rings are in the planets’ rotation planes and why only giant planets have rings. These above phenomenons can demonstrate that Vorticity really exists.

Because the slow rotation of Sun, Sun’s Vorticity is not significant comparing to its gravity. Thus, Kepler’s second law (conservation of angular momentum) is obeyed in planets of our solar system. However, Vorticity is still important in Pulsar or other fast-rotating stars and planets. The discovery of “Vorticity” can help to develop final unified theory and enhance our understanding of universe.

Wanchung Hu
Graduate Student,
National Taiwan University
No1, Ren-Ai Road,
Taipei, 100
Taiwan






Wanchung Hu

PhD candidate,

National Taiwan University, Johns Hopkins University"


 

Offline Bored chemist

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Why is the moon moving further away from the Earth?
« Reply #27 on: 23/09/2008 06:50:56 »
At least some mass then, at least?
Nope.
As I have pointed out before massless photons carry momentum.
 

Offline common_sense_seeker

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Why is the moon moving further away from the Earth?
« Reply #28 on: 23/09/2008 10:02:11 »
But is this enough to push something with the mass of the Moon further away into a higher orbit? I suspect not.
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #29 on: 23/09/2008 15:25:32 »
Yes,it is a perfectly good explanation,but only qualitative analysis, not to mention the quantitative calculation about the moon away from the Earth (3 cm per year).
Correction; the evidence is quaNTitative. The angular momentum of the Earth is changing (measured) and has ended up in the Moon's motion.
Are you suggesting that all this is some sort of State Secret? Is there a conspiracy to suppress what could be a very interesting topic - if it were actually needed to explain what we have observed?
 

Offline common_sense_seeker

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Why is the moon moving further away from the Earth?
« Reply #30 on: 23/09/2008 15:48:38 »
No state secret no, just a complete amnesia to see common sense. If you repeat something often enough, you'll believe it. A Core-Centered Theory of Gravity(CCTG) is the only viable explanation to fit all the facts. The gravitational constant, big G, works for all baryonic matter, but is much higher for dark matter(DM). The calculations of the weight of the planets, the Moon and the Sun are therefore underestimates. Hence a solution to the Missing Mass problem.
« Last Edit: 23/09/2008 15:50:27 by common_sense_seeker »
 

Offline Bored chemist

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Why is the moon moving further away from the Earth?
« Reply #31 on: 23/09/2008 19:23:56 »
A Core-Centered Theory of Gravity(CCTG) is the only viable explanation to fit all the facts. The gravitational constant, big G, works for all baryonic matter, but is much higher for dark matter(DM). The calculations of the weight of the planets, the Moon and the Sun are therefore underestimates. Hence a solution to the Missing Mass problem.
Simply not so. There is at least one competing explanation; it has the advantage that the numbers stack up.
 

Offline DrDick

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Why is the moon moving further away from the Earth?
« Reply #32 on: 23/09/2008 19:53:39 »

                    WHY IS THE MOON NOT SPINNING THEN??  ::)


The moon IS spinning, at a rate of approximately one rotation per month.
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #33 on: 23/09/2008 20:13:42 »
Quote
If you repeat something often enough, you'll believe it.
If you repeat the measurements again and again you get the right answer. That's good enough for me.
I await your theory in detail with some actual numbers which agree with observations - surely that's what Science is all about?

Do you think your computer would allow you to use this forum if the  theories associated with the technology which produced it were as woolly as your theory?
 

Offline wanchung

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Why is the moon moving further away from the Earth?
« Reply #34 on: 24/09/2008 01:34:19 »
Hello, Mr. ZHUYH,

Please don't use my name to announce your theory.

My frame frame-dragging force formula is F=SJw/r^2 (S=2G/c^2, w=relative angular velocity). I get perfectly got the 3.8cm per year that moon is away from earth according to the formula. Please go to www.physorg.com [nofollow] for details!

Sincerely,
Wanchung Hu
PhD
NTU & JHU
 

Offline ZHUYH

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Why is the moon moving further away from the Earth?
« Reply #35 on: 24/09/2008 03:13:53 »
Hi  wanchung:

 Is the letter you wrote it?
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #36 on: 24/09/2008 10:25:36 »
But is this enough to push something with the mass of the Moon further away into a higher orbit? I suspect not.
That is a very revealing comment. You have clearly not understood what is going on. There is no 'pushing' involved. Neither the Moon nor Earth are point masses; they are distributed. The angle subtended by the Earth, when seen from the Moon, is quite large (about 2 degrees). The attractive force due to the effect of Earth's rotation and the resultant drag on the tidal bulges, at this small angle, is enough to be accelerating the Moon - transferring energy to it. As its energy increases, its orbit diameter will also increase.
If you have a theory which involves some other effect then you also need a theory to negate the effect I have just described - which seems to be enough, on its own, to explain the orbit changes.
Good Science tends to be reductionist. I you don't need another theory to explain a phenomenon then why try to invent one? Your new idea may well be just another way of stating a part of the existing theory but in a more complicated way.
OR it may have some substance in it which could explain some much lower order effects. Your numbers would have to be right tho.
« Last Edit: 24/09/2008 10:28:14 by sophiecentaur »
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #37 on: 24/09/2008 10:31:59 »

My frame frame-dragging force formula is F=SJw/r^2 (S=2G/c^2, w=relative angular velocity). I get perfectly got the 3.8cm per year that moon is away from earth according to the formula. Please go to www.physorg.com for details!


I can't find what you refer to here. Perhaps a more detailed link....?
 

Offline common_sense_seeker

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Why is the moon moving further away from the Earth?
« Reply #38 on: 24/09/2008 12:49:52 »
sophiecentaur, do you think tidal braking is also in effect between the Sun and the Earth? If so, this would mean that the Earth is receding from the Sun in a similar way to how the Moon is receding from the Earth, would it not?
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #39 on: 24/09/2008 15:03:56 »
Possibly, but the masses and distance involved are a lot different so the actual amount of the effect would be tiny. How much of a tide do you think the Earth causes on the Sun? Not a lot, I suggest. The Moon is 1/80 of Earth's mass. The Earth is less than 1millionth of the Sun's mass. Remember The Numbers Count! in any theory. Pay attention to them; it may help you understand things a bit better.
 

Offline ZHUYH

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Why is the moon moving further away from the Earth?
« Reply #40 on: 29/10/2008 01:37:20 »
Universal Resistance

Shouyuan Chen
(Information College of Shandong Normal University 250014 Jinan, P.R. China)



--------------------------------------------------------------------------------

Universal Resistance: Every body loses its kinetic energy and resumes to its state of relative rest because resistance is natural and universal force that always is exerted on the body unless the body has been in relative rest state. A body contacts directly with other objects, the resistance exists mainly in form of the frictional force. As a body does not contact directly with other objects, the resistance exists mainly in form of indirect resistance force. The moving object affects other objects by a force field (this is called U-field: its field intensity is in direct proportion to its momentum and is in inverse proportion to the square of distance, and its direction is the same as motion direction), all objects affected by U-field react in return on the moving body, the sum of the all reaction forces is called indirection resistance force. U-field of spin object: U=K(J/R2)COSα,(J—angular momentum, α-the angle between vector radius and the equator plane, R-the distance from the point to center),direction of U-field at each point is the same as that of spin ,and the intensity of U-field is the strongest in the equator place, and is zero at two polar points.

Effects of Universal Resistance: Universal resistance theory asserts that every body is acted on by resistance to lose its kinetic energy and to resumes to the state of relative rest unless it has been in the state. The natural state of motion of any object is relative rest, if a body is not the rest state, it always returns to the rest. This assertion would be in accordance with natural phenomena.

Logical reasoning 1: When every body on the earth moves relatively, resistance makes it to lose its kinetic energy and makes it to return relative rest. The experiments of Galileo’s inertia do not deny this.

Experiment: This assertion appears to be contradicted with one’s everyday experiences. Suppose we exert a force with the hand to move a book along a level table plane. After we are no longer exerting a force on the book, because the frictional force is exerted on the sliding book, the book does not continue to move indefinitely, but slows down and eventually comes to rest. The ball in vibration returns to relative rest with the Earth. And so on.

Logical reasoning 2: As a planet rotates relatively, resistance is exerted on it, and makes it to lose its kinetic energy and so makes it to slows down at long time.

Observation phenomena: Archaeologists find that the rotation of Earth slows down at long time, before six hundred million years, it has 420 days in one year, now it only has 365days.

Logical reasoning 3: If the revolution angular velocity of moons is larger than angular velocity of the rotation of center celestial body, then the moons are affected by universal resistance, they could lose their energy and its orbital radius becomes smaller, its sidereal revolution period becomes shorter.

Astronomical observation phenomena: Phobos is one moon around Mars, it revolves very rapidly, and it completes an obit of Mars in only 7 hours 40 minutes, less than a martian day. Because Phobos orbits more rapidly than Mars rotates, an observer on the surface of Mars would see Phobos moving conspicuously backwards compared to Deimos, the other planets, and stars. Because its revolution angular velocity is lager than the angular velocity of the spin of Mars, universal resistance makes its sidereal revolution period to reduce slowly at one millisecond every cycle. As Phobos is slowly spiraling downward, it should hit Mars in only 30 million years!

Logical reasoning 4: Star rotates, there is universal resistance that is always exerted on it. The star loses their energy of rotation and slows down. If a Star revolves, resistance makes it to lose its kinetic energy of revolution, and so sidereal period become shorter.

Astronomical observation phenomena: Rotation periods of neutron star or pulsating star are remaining very constant, but pulsar is slowing down very slightly. The revolution period of twin neutrons becomes slowly shorter.

Logical reasoning 5: The galaxy that is affected by universal resistance loses its motion energy, and its rotation period becomes longer.

Astronomical observation phenomena: In the galaxy that rotates more quickly, there are more young stars and fewer old stars. In the galaxy that rotates slowly, there are fewer young stars and more old stars.

Logical reasoning 6: Because universal resistance are affected on retrograde moons, the moons lose their energy, and its orbital radius become smaller; then the sidereal revolution period of the moons reduce smaller. We estimate that the sidereal revolution period of Triton that orbits Neptune in retrograde direction becomes smaller at one millisecond per cycle.

Astronomical observation phenomena: so far we don’t find the observation data.
Logical reasoning 7: The rotation motion of center celestial body enables the angle of the equator plane of the center body and the orbit plane of revolution body to become smaller. Because the U-field of the rotation of the center celestial body is: U=K(J/R2)COSα,the U-field force is affected on revolution body in direction of the spin of celestial body at long time, so the direction of revolution motion of the body must be changed to the same as the direction of spin of center body. The orbital plane of revolution body would be changed to the equator plane of spinning center body at long time.

Astronomical observation phenomena: The solar system exhibits many regularities, and theories of its formation must account for them. The orbits of the planets are almost, but not quite circular, and all lie in essentially the same plane that is almost in the equatorial plane of the rotation of the sun. All the planets revolve around the Sun in the same direction, which is the same direction in which the Sun rotates. Moreover, almost all the planets and planetary families of satellites that revolve around them in a manner similar to the way that the planets revolve around the Sun. And the orbits of the planets, with the exception of Pluto, have only small inclination to the ecliptic plane. (see table 1)

Table 1 the same direction planets motion, the same plane of its orbital plane [2].



Logical reasoning 8: The center celestial body must have large angular momentum of the rotation motion, the revolution body around it can move at long time in the same direction as the spin of center celestial body.

Astronomical observation phenomena: In the solar system, the Sun rotates quickly, the planets revolve around the sun in the same direction of the spin of the sun’s spin (see table 1) at long time. The same is true of the moons. Mercury and Venus spin slowly, they have no moons. The planet that spins quickly has more moons.(See table 1) . Some small planets that spin quickly have moons. The number of the moons around a planet is related to the state of the planet’s rotation: generally speaking, a planet with larger rotational angular momentum carries more moons, and a planet with a smaller rotational angular momentum carries fewer. See table 1

Logical reasoning 9: The moving object near the huge celestial body is affected by the reaction of huge celestial body. It loses its energy and slows down. It is nearer to huge celestial body, it loses kinetic energy more quickly.

Astronomical observation phenomena: After we take planets matter density into account to their sidereal rotation periods [1], mean solar day of planets (Mercury, Venus, Earth, Mars, Jupiter & Saturn these six planets) are that the planet is nearer to the sun, its mean solar day is longer, that mean the planet rotates relatively more slowly with the Sun, the planet is far to the sun, its mean solar day is shorter, that mean it rotates relatively with the Sun more quickly.(See table 2).

Six planets relativity rotation periods (that is Day time) Table 2 *----computed data



Logical reasoning 10:Since light has wave properties, and also has the properties of parties. When light moves in the sky, universal resistance causes proton to lose kinetic energy, and then its wavelength become longer. This is called redshift. Galaxy is the more distant, the larger redshift is. If light passes near huge body, the effects of resistance is larger, and then Proton loses more its energy, and so the redshift is larger. We estimate that when lights pass near huge celestial, lights also produce redshift. This redshift is called resistance redshift.

Astronomical observation phenomena I: The light from the remote galaxy becomes red. The galaxy is the more distant, the larger redshift is. Cosmological redshift phenomena are accordance with resistance redshift of universal resistance reasoning.
The most obvious explanation of a “cosmological redshift” is the Doppler effect caused by the big bang theory.

Astronomical observation phenomena II: The light from five quasars around the Seyfert galaxy NCG3516 has a very good correlation between their redshift and their angular distance from NGC3516. The red-shift of these five quasars are 0.33,0.69,0.93, 1.40,and 2.10, the five quasars distance(θ,arcmin) from galaxy NGC3516 are 4.34, 7.34, 10.99, 10.37,11.23 [3]. This is accordance with resistance reasoning that when light move near huge celestial, light also produces redshift.

Logical reasoning 11:Light and gravitation have wave properties and also the properties of parties. When it moves in the sky, it is affected by universal resistance and loses its energy. When proton loses its energy, it doesn’t move to limitless remote place. Limitless remote light and gravitation can move to the earth, the sum to plus them is infinity light intensity and infinity gravitation intensity, this is called Orlbers’s paradox. In fact it doesn’t exist. We think that Universe is same in any one direction, and is uniform in any one place. Because there is universal resistance, universe can be limitless and Orlbers’s paradox does not exist.

Astronomical observation phenomena: So far Orlbers’s paradox phenomena don’t be observed.

Summary

We can explain many phenomena by universal resistance, but it is true or false, it will be confirmed by more observation. We have design experiment to confirm U-field, but we do not do it.

References

1 Chen Shouyuan. Research of Revolution of Solar System Main Charactistics. Shandong industry university, 1997,27-1:87-90
2Jay M.Pasachoff.Astronomy:From the Earth to the Universe.Saunders College.Appendix 3,Appendix 4.
3 Yaoquan Chu and Jingyao Hu .QUASARS AROUND THE SEYFERT GALAXY NGC3516, The Astrophysical Journal ,1998 ,500:596—598

 

Offline ZHUYH

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Why is the moon moving further away from the Earth?
« Reply #41 on: 04/11/2008 01:39:30 »
Google:The Complement of Newton Gravitation Law
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #42 on: 05/11/2008 14:52:07 »
Why?
 

Offline ZHUYH

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Why is the moon moving further away from the Earth?
« Reply #43 on: 06/11/2008 02:09:58 »
Google  Search :
 The Complement of Newton Gravitation Law
 
 

Offline yor_on

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Why is the moon moving further away from the Earth?
« Reply #44 on: 14/11/2008 13:30:11 »
Hmmm A fascinating although slightly, if I may say so, 'out of this universe' thread.
Here is a good explanation by Britt Scharringhausen.
Even I could understand this one:)

"
The Moon's orbit (its circular path around the Earth) is indeed getting larger, at a rate of about 3.8 centimeters per year. (The Moon's orbit has a radius of 384,000 km.) I wouldn't say that the Moon is getting closer to the Sun, specifically, though--it is getting farther from the Earth, so, when it's in the part of its orbit closest to the Sun, it's closer, but when it's in the part of its orbit farthest from the Sun, it's farther away.

The reason for the increase is that the Moon raises tides on the Earth. Because the side of the Earth that faces the Moon is closer, it feels a stronger pull of gravity than the center of the Earth. Similarly, the part of the Earth facing away from the Moon feels less gravity than the center of the Earth. This effect stretches the Earth a bit, making it a little bit oblong. We call the parts that stick out "tidal bulges." The actual solid body of the Earth is distorted a few centimeters, but the most noticeable effect is the tides raised on the ocean.

Now, all mass exerts a gravitational force, and the tidal bulges on the Earth exert a gravitational pull on the Moon. Because the Earth rotates faster (once every 24 hours) than the Moon orbits (once every 27.3 days) the bulge tries to "speed up" the Moon, and pull it ahead in its orbit.

The Moon is also pulling back on the tidal bulge of the Earth, slowing the Earth's rotation. Tidal friction, caused by the movement of the tidal bulge around the Earth, takes energy out of the Earth and puts it into the Moon's orbit, making the Moon's orbit bigger (but, a bit paradoxically, the Moon actually moves slower!).

The Earth's rotation is slowing down because of this. One hundred years from now, the day will be 2 milliseconds longer than it is now.

This same process took place billions of years ago--but the Moon was slowed down by the tides raised on it by the Earth. That's why the Moon always keeps the same face pointed toward the Earth. Because the Earth is so much larger than the Moon, this process, called tidal locking, took place very quickly, in a few tens of millions of years.

Many physicists considered the effects of tides on the Earth-Moon system. However, George Howard Darwin (Charles Darwin's son) was the first person to work out, in a mathematical way, how the Moon's orbit would evolve due to tidal friction, in the late 19th century. He is usually credited with the invention of the modern theory of tidal evolution.

So that's where the idea came from, but how was it first measured? The answer is quite complicated, but I've tried to give the best answer I can, based on a little research into the history of the question.

There are three ways for us to actually measure the effects of tidal friction.

* Measure the change in the length of the lunar month over time.

This can be accomplished by examining the thickness of tidal deposits preserved in rocks, called tidal rhythmites, which can be billions of years old, although measurements only exist for rhythmites that are 900 million years old. As far as I can find (I am not a geologist!) these measurements have only been done since the early 90's.

* Measure the change in the distance between the Earth and the Moon.

This is accomplished in modern times by bouncing lasers off reflectors left on the surface of the Moon by the Apollo astronauts. Less accurate measurements were obtained in the early 70's.

* Measure the change in the rotational period of the Earth over time.

Nowadays, the rotation of the Earth is measured using the Very Long Baseline Interferometry, a technique using many radio telescopes a great distance apart. With VLBI, the positions of quasars (tiny, distant, radio-bright objects) can be measured very accuarately. Since the rotating Earth carries the antennas along, these measurements can tell us the rotation speed of the Earth very accurately.

However, the change in the Earth's rotational period was first measured using eclipses, of all things. Astronomers who studied the timing of eclipses over many centuries found that the Moon seemed to be accelerating in its orbit, but what was actually happening was the the Earth's rotation was slowing down. The effect was first noticed by Edmund Halley in 1695, and first measured by Richard Dunthorne in 1748--though neither one really understood what they were seeing. I think this is the earliest discovery of the effect. "

---------------

As far as I get it you can think of 'tidal friction' (the force moving the Moon away from the Earth) as a kind of 'slingshot'?:)
When the Earth rotates it have the moon attached to the sling, the sling with the Moon in it drags after in that cyclic rotation of the bigger Earth.
Doing this the sling gets 'stretched' and that energy it gets then transfers to the smaller moon, as the slingshot wants to get back to its normal relaxed 'rest position'.
That energy transforms into a faster motion for the moon which will move it slightly outward from the Earth.

As why it then should move slower after that?
Here are reasons I think might have to do with it:)

1. a bigger orbit will give a slower all around time:) also Earths gravitational force will be slightly weaker.
2. And that the energy moving it, is 'taken out' when finished, and so the factual velocity will be the same as for the smaller (former orbit) one, but now 'placed' into a bigger orbit which then will give it a slower speed.
If you get my drift here?

To really get it one has to remember that the moon is actually not so much 'orbiting' the earth as 'falling' around the earth.
It do fall towards the Earth, but due to its speed it will be in a orbit, and due to the tidal friction its energy/(speed, my view)/orbit even increases..

So when a orbiting rocket wants to increase its orbital speed, what does it do?
it lowers its altitude:)



And now I do hope it makes sense.
Although my comments is mine, not Britt Scharringhausen's.
Which make it even, Awhhh:)
Never mind nor matter.

Maybe its possible to say that there are no 'bent lines' in space?
Just as there are no 'straight lines' in nature?
« Last Edit: 14/11/2008 14:47:54 by yor_on »
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #45 on: 14/11/2008 13:43:35 »
Quote
Astronomical observation phenomena: So far Orlbers’s paradox phenomena don’t be observed.
Excuse me. IS the sky infinitely bright? It wasn't the last time I looked out of the window!

I'm sorry, Yor_on, but you may find that normal arguments don't work very well with some contributors. Try to avoid getting too much out of patience with this thread if you intend to keep contributing.
« Last Edit: 14/11/2008 13:48:53 by sophiecentaur »
 

Offline yor_on

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Why is the moon moving further away from the Earth?
« Reply #46 on: 14/11/2008 14:08:33 »
It's cool with me Sophie.
Ideas is always interesting, even when I don't get them.
 

lyner

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Why is the moon moving further away from the Earth?
« Reply #47 on: 14/11/2008 15:46:34 »
It's just that some posts fail the Turing test!
 

Offline Alan McDougall

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Why is the moon moving further away from the Earth?
« Reply #48 on: 15/11/2008 19:29:49 »
If we were hypothetically separate the moon and earth from all other gravitational forces the following will eventually happen


Tidal force push the moon and earth slowly apart 2 centimetres/year and in the distant future  the will eventually into a dumbell orbit, each  having the same side towards each other.

With no tidal forces acting , the moon and earth will very slowly begin to drift towards each other and in the unimaginably far future collide

Alan

 

lyner

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Why is the moon moving further away from the Earth?
« Reply #49 on: 15/11/2008 22:50:39 »
It's more of a 'pull' than a 'push' actually - like swinging a conker on a (flexible) string.
 

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Why is the moon moving further away from the Earth?
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