Moon's Creation Questioned By Chemistry
The origin of the moon has been challenged, creating a new puzzle as to how the moon formed.
- The theory stands that a Mars-sized object hit Earth causing chunks to spin off and create the moon.
- A new study determined that theory to be much less likely as the moon’s chemistry is identical to Earth’s.
- If a collision took place, remnents of the colliding body should also be present.
A study showing lunar chemistry identical to Earth could mean a review of existing theories. Click to enlarge this image.
NASA
New questions have been raised about the birth of the moon after a new study found samples from Earth and the lunar surface to be virtually identical.
The study reported in the journal Nature Geoscience contradicts the theory that the moon formed after the impact of a Mars-sized object named Theia with the early Earth about 4.5 billion years ago.
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At the time both the Earth and Theia were still partially molten, the impact causing Theia’s core to sink into the Earth’s core, while lighter ejecta and debris was thrown into space eventually coalescing to form the moon.
The new study by Junjun Zhang, of the University of Chicago, and colleagues compared isotopic ratios of titanium in lunar and terrestrial samples.
Zhang and colleagues found the ratio of titanium isotopes on both Earth and the moon to be identical to within about four parts per million.
Because the Mars-sized impactor is expected to have been isotopically different, the measurements suggest the moon is either made entirely of material from Earth, or intense mixing occurred on both bodies after impact.
Zhang and colleagues say the similarity can’t be explained by both bodies forming in the same part of the solar system because meteorite samples show extensive diversity in titanium isotopic ratios.
They conclude the isotopes are far more likely to have come from Earth rather than another planet.
Planetary scientist Brad Carter from the University of Southern Queensland says while it’s unlikely to have two planets with the same chemical composition, it’s not impossible.
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Whistler Blowers, Insiders
this comes from the same people who said the earth was flat not many hundreds of years ago. I think i’d rather wait another few hundred years before i believe the “scientific theory”.