Beta
×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

New Proof That the Moon Was Created in a Massive Collision

derekmead (2466858) writes | about 2 years ago

Space 2

derekmead (2466858) writes "New proof that the giant impact hypothesis is correct: A paper published today in Nature shares findings of a chemical analysis of Moon rocks that shows fractional differences between the makeup of the Earth and Moon that most likely were caused by the collision between Earth and a Mars-sized planet around 4.5 billion years ago.

Although the two are quite similar, it’s been previously shown that Moon rocks lack volatile elements, which suggests they may have evaporated during the incredibly intense heat and pressure created during an impact event. But if the hypothesis that light elements actually evaporated from Moon rocks during their formation is correct, you’d expect to find evidence of elements being layered by mass — heavier elements would condense first, and so on.

That process is known as isotopic fractionation — a concept central to carbon dating — and the Washington University team's results suggest they found exactly that. They compared the blend of zinc isotopes in Moon rocks and Earth samples, and found that the Moon rocks held slightly higher proportions of heavier zinc isotopes. If the Moon was indeed once part of Earth — which has been shown by extensive modeling — the difference in the balance of zinc profiles would most likely be explained by lighter zinc isotopes evaporating away following a collision."

cancel ×

2 comments

Sorry! There are no comments related to the filter you selected.

Bad title (1)

bagofbeans (567926) | about 2 years ago | (#41683641)

Should be "New Evidence", not "New Proof".

Re:Bad title (1)

derekmead (2466858) | about 2 years ago | (#41683661)

Yes, that's a mistake. Hope the eds change it if it gets picked up.
Check for New Comments
Slashdot Login

Need an Account?

Forgot your password?