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Message 1524891 - Posted: 5 Jun 2014, 22:00:58 UTC

Theia

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Message 1524895 - Posted: 5 Jun 2014, 22:15:15 UTC - in response to Message 1524891.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.
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Message 1525047 - Posted: 6 Jun 2014, 5:54:34 UTC

I've knew about the collision theory since the beginning, but I didn't know they had given it a name of Theia. It's still not concrete proof yet though.

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Message 1525057 - Posted: 6 Jun 2014, 6:23:30 UTC - in response to Message 1524895.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.

So, Lynn what is your favorite theory about the formation of the moon?

I like the supposition in this report that the material from Theia and earth would be very similar owing to their proximity in the solar system before the collision. So rocks from the moon should be close to but not exactly the same as those on earth. And that is what this study has claimed to have discovered.
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Message 1525227 - Posted: 6 Jun 2014, 15:18:36 UTC
Last modified: 6 Jun 2014, 15:19:01 UTC

Didn't know either it had a name. I vaguely remember reading 'Theia' had about the size of Mars. (not in this article)
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Message 1525277 - Posted: 6 Jun 2014, 18:42:48 UTC - in response to Message 1525057.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.

So, Lynn what is your favorite theory about the formation of the moon?

I like the supposition in this report that the material from Theia and earth would be very similar owing to their proximity in the solar system before the collision. So rocks from the moon should be close to but not exactly the same as those on earth. And that is what this study has claimed to have discovered.



I was not around 4.5bn years ago. Most widely accepted theory is that the Moon was formed when a Mars-sized object slammed into the Earth, billions of ago.

This collision turned the newly formed Earth into a molten ball of rock again, and ejected material into orbit. Most of the material crashed back into the Earth, but some collected together from mutual gravity to form the Moon we have today.
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Message 1525279 - Posted: 6 Jun 2014, 18:45:23 UTC - in response to Message 1525277.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.

So, Lynn what is your favorite theory about the formation of the moon?

I like the supposition in this report that the material from Theia and earth would be very similar owing to their proximity in the solar system before the collision. So rocks from the moon should be close to but not exactly the same as those on earth. And that is what this study has claimed to have discovered.



I was not around 4.5bn years ago. Most widely accepted theory is that the Moon was formed when a Mars-sized object slammed into the Earth, billions of ago.

This collision turned the newly formed Earth into a molten ball of rock again, and ejected material into orbit. Most of the material crashed back into the Earth, but some collected together from mutual gravity to form the Moon we have today.



Yep, that's kinda what I read, thanx Lynn:)
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Message 1525324 - Posted: 6 Jun 2014, 21:55:45 UTC

This made me think about a movie I saw, called "Melancholia", about a hidden rogue planet on a collision course with Earth. Check it out - it's a good, surreal little film.
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Message 1525407 - Posted: 7 Jun 2014, 3:52:57 UTC - in response to Message 1525277.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.

So, Lynn what is your favorite theory about the formation of the moon?

I like the supposition in this report that the material from Theia and earth would be very similar owing to their proximity in the solar system before the collision. So rocks from the moon should be close to but not exactly the same as those on earth. And that is what this study has claimed to have discovered.



I was not around 4.5bn years ago. Most widely accepted theory is that the Moon was formed when a Mars-sized object slammed into the Earth, billions of ago.

This collision turned the newly formed Earth into a molten ball of rock again, and ejected material into orbit. Most of the material crashed back into the Earth, but some collected together from mutual gravity to form the Moon we have today.

That is one and the same with the event in this report.
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Message 1525646 - Posted: 7 Jun 2014, 18:44:39 UTC - in response to Message 1525407.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe.

So, Lynn what is your favorite theory about the formation of the moon?

I like the supposition in this report that the material from Theia and earth would be very similar owing to their proximity in the solar system before the collision. So rocks from the moon should be close to but not exactly the same as those on earth. And that is what this study has claimed to have discovered.



I was not around 4.5bn years ago. Most widely accepted theory is that the Moon was formed when a Mars-sized object slammed into the Earth, billions of ago.

This collision turned the newly formed Earth into a molten ball of rock again, and ejected material into orbit. Most of the material crashed back into the Earth, but some collected together from mutual gravity to form the Moon we have today.

That is one and the same with the event in this report.


So it seems, Bob. Earth was bombarded billions of years ago, by meteors, etc.

The accepted theory since the 1980s is that the Moon arose as a result of a collision between the Earth and Theia 4.5bn years ago.

I find this hard to believe. Well, maybe true. I think the chemical compounds, will need further testing of the rocks, to prove the theory.
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Message 1526589 - Posted: 10 Jun 2014, 22:27:20 UTC - in response to Message 1525646.

Theia, related.

What caused the 'man on the moon'? Higher temperatures weakened the surface and made impacts more visible, study claims

Penn State University revealed evidence for the moon's varying colour
Near side is darker than the far side, but no-one was sure why - until now
Scientists suggest this change is due to the moon and Earth's formation
Early in its life Earth was scorching hot and heated the near side
This weakened it and made it more vulnerable to impacts, while the far side formed a thicker crust that was more resilient to meteorites

http://www.dailymail.co.uk/sciencetech/article-2653908/What-caused-man-moon-Higher-temperatures-weakened-surface-impacts-visible-study-claims.html
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Message 1526785 - Posted: 11 Jun 2014, 9:20:35 UTC

Also Theia related:

Dark side of the moon: 55-year-old mystery solved

The Man in the Moon appeared when meteoroids struck the Earth-facing side of the moon creating large flat seas of basalt that we see as dark areas called maria. But no "face" exists on farside of the moon and now, astrophysicists think they know why. This mystery is called the Lunar Farside Highlands Problem and dates back to 1959, when the Soviet spacecraft Luna 3 transmitted the first images of the "dark" side of the moon back to Earth.

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Message 1526798 - Posted: 11 Jun 2014, 10:05:16 UTC
Last modified: 11 Jun 2014, 10:06:54 UTC

Far side of the moon: this is a composite image of the lunar farside taken by the Lunar Reconnaissance Orbiter in June 2009, note the absence of dark areas.

And London buses, and various WWII aircraft, and .......

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Message 1526799 - Posted: 11 Jun 2014, 10:13:09 UTC - in response to Message 1526798.

Far side of the moon: this is a composite image of the lunar farside taken by the Lunar Reconnaissance Orbiter in June 2009, note the absence of dark areas.

And London buses, and various WWII aircraft, and .......



....flags, planted by various astronauts who set foot there...
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Message 1527285 - Posted: 12 Jun 2014, 15:30:21 UTC
Last modified: 12 Jun 2014, 15:31:42 UTC

Not only on the Moon, but also on Earth, traces of the collision were found:

Moon-Forming Crash Left A ‘Signal’ In Planet Earth

The new research says that evidence of this collision would have showed up in the mantle, a layer of the Earth’s interior, and could explain a puzzling difference in isotopes (types) of certain elements that was known before. The team said that the impact did not completely stir the mantle, which would explain why the ratio of isotopes of helium and nitrogen inside the shallow part of the mantle is much higher than the deep mantle.

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Message 1527501 - Posted: 12 Jun 2014, 21:43:50 UTC - in response to Message 1527285.

Earth & Moon May Be 60 Million Years Older Than We Thought

So much for our long-held ideas about the age of the Earth and the moon.

http://www.huffingtonpost.com/2014/06/12/earth-moon-60-million-years-older_n_5485527.html
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Message 1527503 - Posted: 12 Jun 2014, 21:59:34 UTC - in response to Message 1527501.

Earth & Moon May Be 60 Million Years Older Than We Thought

So much for our long-held ideas about the age of the Earth and the moon.

http://www.huffingtonpost.com/2014/06/12/earth-moon-60-million-years-older_n_5485527.html


:) Interesting though. Thanks Lynn. :)

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