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  1. #1

    Default Where did the Moon come from? o_o

    I heard that it used to be part of the earth... but that theory doesnt really make much sense. So, if it didnt come from earth, where did it come from? Outer Space?

    And if so, that would mean that the moon at one time was traveling through space, passed by the earth, and got caught in its gravitational field. But how can this be? The Moon's orbit is almost a perfect circle... If it got caught by our gravity, its orbit SHOULD be alot more eliptical. And also, why does One side always face the Earth? If it came from space it would be rotating.

    So what kind of conclusion can be drawn from this? Well, If it didnt come from the Earth, and If it didnt pass by us, then the only conclusion is that it was put here by some outside intelligent force, whatever that might be.

    pretty cool, huh?

  2. #2

    Default Re: Where did the Moon come from? o_o

    It was related to the collision between a small planet and Earth, which eventually leads to a ring of debris that was shot from the Earth's atmosphere after the collision to surround the Earth like the ring of Saturn. This ring was a full circle which as the debris were held together, formed a moon.

  3. #3
    Primicerius
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    Default Re: Where did the Moon come from? o_o

    Mars and the Earth collided.

  4. #4
    Vicarius
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    Default Re: Where did the Moon come from? o_o

    Quote Originally Posted by Greve Armfelt View Post
    Mars and the Earth collided.
    After what I have read it was a mars sized body and not necessarily mars itself, but Im no expert.
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    MaximiIian's Avatar Comes Limitis
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    Default Re: Where did the Moon come from? o_o

    Quote Originally Posted by Mathias View Post
    After what I have read it was a mars sized body and not necessarily mars itself, but Im no expert.
    Yep. ?he current model of the Giant Impact Hypothesis posit that a mars-sized asteroid (or something like an asteroid) collided with the earth, whacking a large amount of debris into earth's orbit. As this illustration from wikipedia shows:

  6. #6
    Syron's Avatar Civitate
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    Default Re: Where did the Moon come from? o_o

    That is a terribly innacurate model but i suppose it get the jist of it. there was a much better animation but i can't remember where it is

    Edit: one here but the quality isn't great

    http://www.pbs.org/wgbh/nova/tothemoon/origins2.html
    Last edited by Syron; April 09, 2007 at 03:20 PM.
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  7. #7
    Sidus Preclarum's Avatar Honnête Homme.
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    Default Re: Where did the Moon come from? o_o

    Quote Originally Posted by Lunar4 View Post
    I heard that it used to be part of the earth... but that theory doesnt really make much sense.
    Rule of thumb: if a scientific theory widely regarded as plausible by the scientific community appears "not to make much sense" to you, and you're not a member of said community, the fault generally lies with you, not with said theory...

    So, if it didnt come from earth, where did it come from? Outer Space?
    that's one of the other, less favoured, hypothesis

    And if so, that would mean that the moon at one time was traveling through space, passed by the earth, and got caught in its gravitational field. But how can this be? The Moon's orbit is almost a perfect circle... If it got caught by our gravity, its orbit SHOULD be alot more eliptical. And also, why does One side always face the Earth? If it came from space it would be rotating.
    rule of thumb2: if you're not a member of said scientific community, and believe you've thought of something that it hasn't thought of, which ruins their theories, you've probably missing something

    Credits where it's due, though, those were rather interesting questions and attempt at answering them (up to the conclusion, which was less so). Refreshing compared to, say , stuff like "aha, but even if global warming causes ice to melt, the levels of the seas won't rise, any fools knows that ice melting in a glass doesn't cause the level to rise, and yet the stupid scientist of the church of the global warming hoax didn"t even think of that"
    Last edited by Sidus Preclarum; April 09, 2007 at 01:43 PM.

  8. #8
    John I Tzimisces's Avatar Get born again.
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    Default Re: Where did the Moon come from? o_o

    A mars sized body collided with the still molten earth, flinging relatively "light" material into space (explaining the low iron content and either small or nonexistant iron core of the moon), captured by the earth's gravitational field, which eventually congealed into the moon. The end.

  9. #9
    Wild Bill Kelso's Avatar Protist Slayer
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    Default Re: Where did the Moon come from? o_o

    Quote Originally Posted by John I Tzimisces View Post
    A mars sized body collided with the still molten earth, flinging relatively "light" material into space (explaining the low iron content and either small or nonexistant iron core of the moon), captured by the earth's gravitational field, which eventually congealed into the moon. The end.

    But John.. isn't the Fifth element hypothesis so much cooler? Come one.. a hot woman shootinga magic bolt from her mouth into space to stop a colliding ball of evil...so much better

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    Ulyaoth's Avatar Truly a God Amongst Men
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    Default Re: Where did the Moon come from? o_o

    It was a small planet called Thea I think, the earth was much smaller then, and molten as had been said, they collided, a small chunk of Thea broke off and became the moon, the rest melted into a new bigger Earth.
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  11. #11
    MaximiIian's Avatar Comes Limitis
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    Default Re: Where did the Moon come from? o_o

    It's not "terribly inaccurate". It shows basically the same thing that yours does. Just without the fancy CGI and the tiny, tiny detailed debris cloud.

  12. #12
    Beiss's Avatar Nemo nascitur...
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    Default Re: Where did the Moon come from? o_o

    That's one big whack. Good thing it didn't happen tomorrow.
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    Simetrical's Avatar Former Chief Technician
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    Default Re: Where did the Moon come from? o_o

    Off-topic posts deleted. The topic is scientific explanations, not their metaphysical ramifications. A single topic to discuss the latter is fine here, bringing it into unrelated threads is not.

    Edit: Deleted another post bringing up God. Wrong thread, wrong forum.
    Last edited by Simetrical; April 15, 2007 at 05:29 PM.
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  14. #14

    Default Re: Where did the Moon come from? o_o

    The moon is the Rosetta stone of the planets." —Robert Jastrow, First Chairman, NASA Lunar Exploration Committee

    After hundreds of years of detailed observation and study, our closest companion in the vast universe, Earth’s moon, remains an enigma. Six moon landings and hundreds of experiments have resulted in more questions being asked than answered. Among them:

    1. Moon’s Age: The moon is far older than previously expected. Maybe even older than the Earth or the Sun. The oldest age for the Earth is estimated to be 4.6 billion years old; moon rocks were dated at 5.3 billion years old, and the dust upon which they were resting was at least another billion years older.
    2. Rock’s Origin: The chemical composition of the dust upon which the rocks sat differed remarkably from the rocks themselves, contrary to accepted theories that the dust resulted from weathering and breakup of the rocks themselves. The rocks had to have come from somewhere else.
    3. Heavier Elements on Surface: Normal planetary composition results in heavier elements in the core and lighter materials at the surface; not so with the moon. According to Wilson, "The abundance of refractory elements like titanium in the surface areas is so pronounced that several geologists proposed the refractory compounds were brought to the moon’s surface in great quantity in some unknown way. They don’t know how, but that it was done cannot be questioned." (Emphasis added).
    4. Water Vapor: On March 7, 1971, lunar instruments placed by the astronauts recorded a vapor cloud of water passing across the surface of the moon. The cloud lasted 14 hours and covered an area of about 100 square miles.
    5. Magnetic Rocks: Moon rocks were magnetized. This is odd because there is no magnetic field on the moon itself. This could not have originated from a "close call" with Earth—such an encounter would have ripped the moon apart.
    6. No Volcanoes: Some of the moon’s craters originated internally, yet there is no indication that the moon was ever hot enough to produce volcanic eruptions.
    7. Moon Mascons: Mascons, which are large, dense, circular masses lying twenty to forty miles beneath the centers of the moon’s maria, "are broad, disk-shaped objects that could be possibly some kind of artificial construction. For huge circular disks are not likely to be beneath each huge maria, centered like bull’s-eyes in the middle of each, by coincidence or accident." (Emphasis added).
    8. Seismic Activity: Hundreds of "moonquakes" are recorded each year that cannot be attributed to meteor strikes. In November, 1958, Soviet astronomer Nikolay A. Kozyrev of the Crimean Astrophysical Observatory photographed a gaseous eruption of the moon near the crater Alphonsus. He also detected a reddish glow that lasted for about an hour. In 1963, astronomers at the Lowell Observatory also saw reddish glows on the crests of ridges in the Aristarchus region. These observations have proved to be precisely identical and periodical, repeating themselves as the moon moves closer to the Earth. These are probably not natural phenomena.
    9. Hollow Moon: The moon’s mean density is 3.34 gm/cm3 (3.34 times an equal volume of water) whereas the Earth’s is 5.5. What does this mean? In 1962, NASA scientist Dr. Gordon MacDonald stated, "If the astronomical data are reduced, it is found that the data require that the interior of the moon is more like a hollow than a homogeneous sphere." Nobel chemist Dr. Harold Urey suggested the moon’s reduced density is because of large areas inside the moon where is "simply a cavity." MIT’s Dr. Sean C. Solomon wrote, "the Lunar Orbiter experiments vastly improved our knowledge of the moon’s gravitational field . . . indicating the frightening possibility that the moon might be hollow." In Carl Sagan’s treatise, Intelligent Life in the Universe, the famous astronomer stated, "A natural satellite cannot be a hollow object."
    10. Moon Echoes: On November 20, 1969, the Apollo 12 crew jettisoned the lunar module ascent stage causing it to crash onto the moon. The LM’s impact (about 40 miles from the Apollo 12 landing site) created an artificial moonquake with startling characteristics—the moon reverberated like a bell for more than an hour. This phenomenon was repeated with Apollo 13 (intentionally commanding the third stage to impact the moon), with even more startling results. Seismic instruments recorded that the reverberations lasted for three hours and twenty minutes and traveled to a depth of twenty-five miles, leading to the conclusion that the moon has an unusually light—or even no—core.
    11. Unusual Metals: The moon’s crust is much harder than presumed. Remember the extreme difficulty the astronauts encountered when they tried to drill into the maria? Surprise! The maria is composed primarily illeminite, a mineral containing large amounts of titanium, the same metal used to fabricate the hulls of deep-diving submarines and the skin of the SR-71 "Blackbird". Uranium 236 and neptunium 237 (elements not found in nature on Earth) were discovered in lunar rocks, as were rustproof iron particles.
    12. Moon’s Origin: Before the astronauts’ moon rocks conclusively disproved the theory, the moon was believed to have originated when a chunk of Earth broke off eons ago (who knows from where?). Another theory was that the moon was created from leftover "space dust" remaining after the Earth was created. Analysis of the composition of moon rocks disproved this theory also. Another popular theory is that the moon was somehow "captured" by the Earth’s gravitational attraction. But no evidence exists to support this theory. Isaac Asimov, stated, "It’s too big to have been captured by the Earth. The chances of such a capture having been effected and the moon then having taken up nearly circular orbit around our Earth are too small to make such an eventuality credible."
    13. Weird Orbit: Our moon is the only moon in the solar system that has a stationary, near-perfect circular orbit. Stranger still, the moon’s center of mass is about 6000 feet closer to the Earth than its geometric center (which should cause wobbling), but the moon’s bulge is on the far side of the moon, away from the Earth. "Something" had to put the moon in orbit with its precise altitude, course, and speed.
    14. Moon Diameter: How does one explain the "coincidence" that the moon is just the right distance, coupled with just the right diameter, to completely cover the sun during an eclipse? Again, Isaac Asimov responds, "There is no astronomical reason why the moon and the sun should fit so well. It is the sheerest of coincidences, and only the Earth among all the planets is blessed in this fashion."
    15. Spaceship Moon: As outrageous as the Moon-Is-a-Spaceship Theory is, all of the above items are resolved if one assumes that the moon is a gigantic extraterrestrial craft, brought here eons ago by intelligent beings. This is the only theory that is supported by all of the data, and there are no data that contradict this theory.

    16. Lunar Bridge: On July 29, 1953, John J. O’Neill observed a 12-mile-long bridge straddling the crater Mare Crisium. In August, British astronomer Dr. H.P. Wilkens verified its presence, "It looks artificial. It’s almost incredible that such a thing could have been formed in the first instance, or if it was formed, could have lasted during the ages in which the moon has been in existence.
    17. The Shard: The Shard, an obelisk-shaped object that towers 1½ miles from the Ukert area of the moon’s surface, was discovered by Orbiter 3 in 1968. Dr. Bruce Cornet, who studied the amazing photographs, stated, "No known natural process can explain such a structure."
    18. The Tower: One of the most curious features ever photographed on the Lunar surface (Lunar Orbiter photograph III-84M) is an amazing spire that rises more than 5 miles from the Sinus Medii region of the lunar surface.
    19. The Obelisks: Lunar Orbiter II took several photographs in November 1966 that showed several obelisks, one of which was more than 150 feet tall. ". . . the spires were arranged in precisely the same was as the apices of the three great pyramids."
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  15. #15
    Simetrical's Avatar Former Chief Technician
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    Default Re: Where did the Moon come from? o_o

    I would be impressed by a few more citations there.
    The moon is far older than previously expected. Maybe even older than the Earth or the Sun. The oldest age for the Earth is estimated to be 4.6 billion years old; moon rocks were dated at 5.3 billion years old, and the dust upon which they were resting was at least another billion years older.
    Wikipedia helpfully provides a link to a scientific paper on this: "The data reveal differences in indigenous 182W/184W of lunar mantle reservoirs, indicating crystallization of the lunar magma ocean 4.527 ± 0.010 billion years ago. This age is consistent with the giant impact hypothesis and defines the completion of the major stage of Earth's accretion." Does the 5.3 billion years point have a citation from Science? No? Next point. But really, I don't think it's worth going on.
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  16. #16

    Default Re: Where did the Moon come from? o_o

    Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, Almighty God! I know not what course others may take; but as for me, give me liberty or give me death!"

  17. #17

    Default Re: Where did the Moon come from? o_o

    The giant impact hypothesis is pretty well accepted at this point. You're going to need more than a couple convenient coincidences and a bunch of points without citations that could be flat out lies to disprove it (especially given that the theory you're suggesting is that it is, in fact, a spaceship.)

  18. #18

    Default Re: Where did the Moon come from? o_o

    Quote Originally Posted by ajm317 View Post
    The giant impact hypothesis is pretty well accepted at this point. You're going to need more than a couple convenient coincidences and a bunch of points without citations that could be flat out lies to disprove it (especially given that the theory you're suggesting is that it is, in fact, a spaceship.)
    One of my favorites..

    "I don't mind being called a "conspiracy theorist" by those who don't mind being called a "coincidence theorist"."
    Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, Almighty God! I know not what course others may take; but as for me, give me liberty or give me death!"

  19. #19

    Default Re: Where did the Moon come from? o_o

    You can find numerical coincidences like that anywhere if you look hard enough.

    My girlfriends age, multiplyed by 20, divided by the number of cards in a deck is the address of the Prime Minister of the United Kingdom!!! Coincidence? Or is my girlfriend a member of an age old conspiracy which controls the United Kingdom and communicates via playing card?

  20. #20

    Default Re: Where did the Moon come from? o_o

    coincidence theorist!!! run for your lives!!!
    Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, Almighty God! I know not what course others may take; but as for me, give me liberty or give me death!"

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