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The Earth and Moon were created as the result of a giant collision between two planets the size of Mars and Venus. Until now it was thought to have happened when the solar system was 30 million years old or approx. 4,537 million years ago. But new research from the Niels Bohr Institute shows that the Earth and Moon must have formed much later - perhaps up to 150 million years after the formation of the solar system. The research results have been published in the scientific journal, Earth and Planetary Science Letters.
"We have determined the ages of the Earth and the Moon using tungsten isotopes, which can reveal whether the iron cores and their stone surfaces have been mixed together during the collision", explains Tais W. Dahl, who did the research as his thesis project in geophysics at the Niels Bohr Institute at the University of Copenhagen in collaboration with professor David J. Stevenson from the California Institute of Technology (Caltech).
The planets in the solar system were created by collisions between small dwarf planets orbiting the newborn sun. In the collisions the small planets melted together and formed larger and larger planets. The Earth and Moon are the result of a gigantic collision between two planets the size of Mars and Venus. The two planets collided at a time when both had a core of metal (iron) and a surrounding mantle of silicates (rock). But when did it happen and how did it happen? The collision took place in less than 24 hours and the temperature of the Earth was so high (7000º C), that both rock and metal must have melted in the turbulent collision. But were the stone mass and iron mass also mixed together?
Earth reached mature size 30 million years after the Sun's birth, the two independent results show. This is in line with the leading theoretical model and most other indicators.
However, this is about 70 million years quicker than what was expected by Moon formation theorists.
"Earth is older than previously thought," Kleine told SPACE.com. "Our data indicate that these collisions caused almost complete melting of Earth resulting in a scenario called magma ocean, in which the Earth was covered by a layer of magma."
Both studies concluded that Earth formed in the first 30 million years of the solar system's existence.
Originally posted by dragonsmusic
So they were off by a mere 150 million , eh ? Seriously though, that's not considered a lot in science is it?
Originally posted by Violater1
I now wonder that as the internal metal core cools, this would be the reason that the Earth is expanding/growing. The cooler area around the outer core would thicken, applying pressure, and increased heat, causing volcanic disruptions and earthquakes.
I don't know, I'm just saying.
Originally posted by predator0187
Sorry for the rant. I always get a little upset when people compare religion and science, it's like oil and water.
Originally posted by ACTS 2:38
It is not science when a statement, "it was thought to have happened" and "must have formed".
These are not factual statements, but are used and believed by sheepish people as such. There is no way to test their ideals and for sure not repeatable.
That's the way scientists talk.
Originally posted by habfan1968
the article seems to be presenting some facts as to the age of the earth and the moon based on a collision that happened but there is little in way of fact other than the tungsten isotope theory. So really, are they saying with impunity that this is fact? It seems to me that if they use terms such as "we believe" or "it was thought" , those terms are in fact faith based statements.