Origins of the Moons

vogon13 · Sep 9, 2006

Maybe it's preggers . . . . <div class="Discussion_UserSignature"> TPTB went to Dallas and all I got was Plucked !!So many people, so few recipes !!Let's clean up this stinkhole !! </div>

MeteorWayne · Sep 9, 2006

Wait, if the Vogons are interested, there may be an explanation here..... A toll booth perhaps? <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

eagledare · Sep 10, 2006

Sorry don't know what happened on the upload-will try again with europa.

eagledare · Sep 10, 2006

Ok here is Dione again--I hope

eagledare · Sep 10, 2006

MeteorWayne: Mysta stopped expanding Just one last request. Look at this video clip of Ganymede a moon of Jupiter. and tell me what you think of it. have a look at them all if you have broadband. http://www.nealadams.com/nmu.html Clip#10.

vogon13 · Sep 10, 2006

The marks on Dione are cliffs, not stretch marks, btw. <div class="Discussion_UserSignature"> TPTB went to Dallas and all I got was Plucked !!So many people, so few recipes !!Let's clean up this stinkhole !! </div>

CalliArcale · Sep 11, 2006

It's obvious in the closeup shots. The "streaks" were a total mystery ever since the Voyagers passed Saturn. But one close look from Cassini and it became crystal clear. I vividly remember the feeling I had as I looked at the first, raw .jpgs posted on the Cassini website. There had been no press announcement, but instantly I understood. They weren't streaks at all. They were cliffs. Jagged, white cliffs. Scientific discoveries usually aren't so obvious, but this was extraordinary. It was plain as day. Of course, it does still leave open the question of how the cliffs formed. And that's just as much a mystery as the "streaks" were. That's what so cool about science. <img src="/images/icons/wink.gif" /> There's always more to explore. <div class="Discussion_UserSignature"> "People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff." -- The Tenth Doctor, "Blink" </div>

eagledare · Jan 4, 2007

Thanks Search but I will stop writing about this subject as it is far beyond our science of today but unfortuanitly it will only be seen when our 2nd moon is born but then there will be no more internet to discuss the matter. Maybe I will be taken more seriously after the whole East coast of America sank into the sea Which is part of the process.

MeteorWayne · Jan 4, 2007

How much of the east coast? I live in NW New Jersey, do I need to sell my property? If so, where should I purchase the new oceanfront? <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

MeteorWayne · Jan 4, 2007

Sadly, my BIL moved to PA based on the prediction of Chief Whatever, since all of NJ was to be under water in 1998. I have a flotation device, though <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

eagledare · Jan 5, 2007

Sorry there my mistake . I meant the West coast Cal. and right up to Siliconvalley. My humbel app. almost got you buying realest. on the wrong side. LOL.

MeteorWayne · Jan 5, 2007

So when is the coast sinking, and where is the line that I should buy real estate on? CA/NV border, or west or east of there? And more importantly, when? Need to time the move for most effect! Thanx, Wayne <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

nexium · Jan 6, 2007

The middle of the north shore of the Gulf of Mexico is sinking about one centimeter per year, but not the Atlantic coast except for a few off shore islands. I have not heard any predictions for the effect on the Florida coast line if the New Madrid fault makes a big shift as it last did in 1812. A few people think a big quake is past due, others think we are OK for another century or two. Neil

MeteorWayne · Jan 6, 2007

Neil, you are trying to make sense. I'll wait for eagledare to answer my questions about the left coast <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

vidar · Jan 6, 2007

I didn’t bother much to read the other postings, so this might be said before. I think several moons are dwarf planets, according to the new definition. Most of them have been swallowed by the Sun, but some have been caught in orbit of other planets. These are examples: http://www.solarviews.com/browse/misc/plntmoon.jpg Our moon is a planet. It’s orbiting the sun like Earth, although zig-zaging, but never orbiting, our planet. http://en.wikipedia.org/wiki/Orbit_of_the_Moon#The_Earth_.26_Moon.27s_path_around_the_Sun Our moon can therefore be a dwarf planet caught in Earth orbit.

eagledare · Jan 7, 2007

MeteorWayne if I knew exactly the time and place I would be doing some buying myself but on 2nd thoughts I would rather stay here on safe South African rock. I do think it is going to be before 2020, a closer guese would be around 2012. If you look at the ocean rift in the atlantic ocean it meets up with the East coast and no spreading took place. What is holding it back?

nexium · Jan 7, 2007

We're wandering from good science in this thread with some posters making light of the bad science. We do not know for sure how any of the moons originated. There are several hypothesis, a few of which may have enough evidence to be theories. None of the moons are presently dwarf planets by the new definition. A few of them might have been dwarf planets (by the new definition) billions of years ago. Moons including Earth's moon do orbit the sun, in a sence, but it is more correct to say that moons orbit their planet. There are some exceptions, but Earth's moon is not one of them as the center of rotation falls below the surface of Earth. Until the new definition, we called the 4.6 billion year ago objects proto planets and proto moons. Some were likely swallowed by the sun, but typically a near miss of the sun (or other body) results in a sling shot manuver = gravity assist manuver. My guess is the Sun (and Jupiter) swallowed only a small percentage of small proto planets, but did eject some from the solar system. Capture senarios are popular at present, but my guess is sanity will return to astronomy with capture being counted as an unlikely origin of any of the moons. Neil

vidar · Jan 8, 2007

The new, and immature I must say, definition of dwarf planets can’t hold long. Funny enough, the largest planet isn’t even a dwarf because it hasn’t ‘cleared its path’ http://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Asteroid_Belt.jpg/539px-Asteroid_Belt.jpg . I also suspect Mercury of having some help from the Sun when clearing its path. We don’t even know much about Pluto’s surroundings because the images of it are so blurred. Suddenly there were four of them, - there might be a whole cluster of TNOs http://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Pluto_system_2006.jpg/600px- Planets used to be very exiting, until we discovered that we probably can land on only one of them, - Mars. Moons, however, have become most interesting, because some of them are more terrestrial than most planets. I just read an article that the Milky Way ejects stars, so I suppose our star might have ejected planets. The idea of rough stars, planets and even moons are a little scary, some might head this way. Anyway, I believe moons could be rough dwarf planets caught in planets orbits.

eagledare · Jan 28, 2007

No replies yet?

eagledare · Feb 4, 2007

SEARCH: Sorry but your theory has already a basic flaw: The best age for the Earth (4.54 Ga) is based on old, presumed single-stage leads coupled with the Pb ratios in troilite from iron meteorites, specifically the Canyon Diablo meteorite. In addition, mineral grains (zircon) with U-Pb ages of 4.4 Ga have recently been reported from sedimentary rocks in west-central Australia. The Moon is a more primitive planet than Earth because it has not been disturbed by plate tectonics; thus, some of its more ancient rocks are more plentiful. Only a small number of rocks were returned to Earth by the six Apollo and three Luna missions. These rocks vary greatly in age, a reflection of their different ages of formation and their subsequent histories. The oldest dated moon rocks, however, have ages between 4.4 and 4.5 billion years and provide a minimum age for the formation of our nearest planetary neighbor. Me: Sorry I'm getting back to you so late on this one. If the Moon originated from the Earth most of the rocks were then already formed thus the age will already be imprinted and it will not reflext the age of the Moon as such.

search · Feb 4, 2007

This one goes and goes on... Hello eagledare no problem to get back to it. First I do not have a theory of the Moon. Second I do not see the flaw you are talking about. The fact that the moon does not have tectonic plates just prevents the old rocks of being replaced by new ones and thus being more difficult to find as it is on earth but in the end as you mentioned the dates of the few old rocks found on earth are about the same as the ones brought from the moon. It is not that the moon is older. It just looks older. A bit like some people.<img src="/images/icons/wink.gif" />

lukman · Feb 4, 2007

Planets have moon(s), composition of moon happens to be similar to earth, but not other moons on other planets. Why there are moons, because the object is big enough too have gravity to keep the moon, even pluto has a moon. Earth is moon too, moon to the sun. <div class="Discussion_UserSignature"> </div>

majornature · Feb 5, 2007

Another theory suggests that "Orpheus" which was probably a planet between earth and mars collided into the "Proto Earth". After the impact, a new earth was born with the debris of that small planet. Some of the debris from the impact clumped up to form a small ball of rock which is one- fourth size of the earth. With earth's gravity playing a key role, this small rock begin orbiting. <div class="Discussion_UserSignature"> We are born. We live. We experiment. We rot. We die. and the whole process starts all over again! Imagine That! <img id="6e5c6b4c-0657-47dd-9476-1fbb47938264" style="width:176px;height:247px" src="http://sitelife.space.com/ver1.0/Content/images/store/14/4/6e5c6b4c-0657-47dd-9476-1fbb47938264.Large.jpg" alt="blog post photo" width="276" height="440" /> </div>

eagledare · May 22, 2007

Venus don't have a moon Yet but it is not to say that it will not have a moon in the future. There is no proof that the planets and moons co-accreted. I think we just don't know how anything is as it is we are just guesing and trying to make sense of it all. But we have to start somewhere or do we have to? It goes on and on without our help and understanding.

MeteorWayne · May 22, 2007

That's a bunch of hooey. With the current construction of the solar system, the possibility of Venus capturing a moon is near zero, and there are no impactors large enough floating around to create a debris ring. Co-accretion, is not even an issue, escpecially after the first few hundred thousand years of the solar system, as there's not enough stuff to create a moon in the entire inner solar system. Even all the asteroids in the asteroid belt would barely make a decent sized moon, even if you managed somehow to collect all the mass together in one spot, which is not possible.. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

Origins of the Moons

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