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[RT] Violent, head-to-head crash between Earth and another planet created the moon - Page 5

post #41 of 72
Quote:
Originally Posted by MoGTy View Post


Feel free to use them any way you like. Even if incorrectly in this setting. Considering we're talking about scientific theories.

well if you want:

how can we talk scientific theory since no one can observe two 100 million year old planets collide?

unless they are 4 billion and 400 million years old? (roughly)


would you rather hear . .hypothesis? tongue.gif
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post #42 of 72
Quote:
Originally Posted by looniam View Post

well if you want:

how can we talk scientific theory since no one can observe two 100 million year old planets collide?

unless they are 4 billion and 400 million years old? (roughly)


would you rather hear . .hypothesis? tongue.gif

Sadly I'm not in a position to judge that myself. Experts in the field should do so based on their findings.
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post #43 of 72
Quote:
Originally Posted by epic1337 View Post

it was a theoretical assumption back then, and they're still trying to prove it till this day.

just one thing that bothers me though, such a massive collision should've left a mark on earth, where is that said mark? the pacific ring of fire?
Well they claim it was struck while the the planet was still forming so it could have filled back in some during this point, if so that could be why we have such a deep ocean.
    
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post #44 of 72
Quote:
Originally Posted by MoGTy View Post

Sadly I'm not in a position to judge that myself. Experts in the field should do so based on their findings.

now you got me curious.

since you criticized my choice, i ask of you to suggest a proper term.

what would you prefer?

not trying to be a PITA - just believe if someone finds fault they are then responsible to help find a solution.

TIA thumb.gif
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post #45 of 72
Quote:
Originally Posted by Twist86 View Post

Well they claim it was struck while the the planet was still forming so it could have filled back in some during this point, if so that could be why we have such a deep ocean.

yeah thats one possible out come, but some had pointed out that the impact by itself has enough energy to melt the entire surface of the earth.
this invalidates the formation of the crust and leaving out a mark, plus such a crater would've reached down towards the lower mantle.

so i took a look at the most possible "marks", being under the crust, with one hint points out that earth's core is unusually large compared to other planets.
since earth's core is primarily composed of iron, where did all that iron come from? just to note, earth is officially classified as a terrestrial (silicate) planet.

the closest theory to that seems to be theia's collision, with a parts of theia and earth forming the moon, while the rest of theia sinking down towards the core of earth.
Edited by epic1337 - 1/31/16 at 7:33am
post #46 of 72
Quote:
Originally Posted by looniam View Post

now you got me curious.

since you criticized my choice, i ask of you to suggest a proper term.

what would you prefer?

not trying to be a PITA - just believe if someone finds fault they are then responsible to help find a solution.

TIA thumb.gif

I'm not in a position to say for sure, but with the article in mind. I think the hypothesis mentioned in the article is at this moment insufficiently proven and not yet up for peer review that could sustain the standards of what qualifies as scientific theory.
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post #47 of 72
To come up with conclusions they did they need to know the isotope content of Theia, which they don't simply because it doesn't exist anymore.
Another guessing game...
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post #48 of 72
Quote:
Originally Posted by MoGTy View Post


I'm not in a position to say for sure, but with the article in mind. I think the hypothesis mentioned in the article is at this moment insufficiently proven and not yet up for peer review that could sustain the standards of what qualifies as scientific theory.

actually it has observable testing which would put it past a hypothesis and does have a study published for peer review.

http://newsroom.ucla.edu/releases/moon-was-produced-by-a-head-on-collision-between-earth-and-a-forming-planet
Quote:
In 2014, a team of German scientists reported in Science that the moon also has its own unique ratio of oxygen isotopes, different from Earth’s. The new research finds that is not the case.

“We don’t see any difference between the Earth’s and the moon’s oxygen isotopes; they’re indistinguishable,” said Edward Young, lead author of the new study and a UCLA professor of geochemistry and cosmochemistry.
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post #49 of 72
Quote:
Originally Posted by looniam View Post

actually it has observable testing which would put it past a hypothesis and does have a study published for peer review.

http://newsroom.ucla.edu/releases/moon-was-produced-by-a-head-on-collision-between-earth-and-a-forming-planet

Yes that's correct. I was making an educated guess without being fully informed about the status of this hypothesis. I guess we can put the status at "an hypothesis up for peer review" wink.gif
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post #50 of 72
Quote:
Originally Posted by MoGTy View Post

Yes that's correct. I was making an educated guess without being fully informed about the status of this hypothesis. I guess we can put the status at "an hypothesis up for peer review" wink.gif

academia is proud of us. biggrin.gif

btw, i get your point and i'll agree - theory gets overused.

E;
please don't tell me if i misused academia, forgive me, it's past my bedtime (i have night owl hours).
Edited by looniam - 1/31/16 at 7:52am
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