On 1/30/16 6:55 PM, Yousuf Khan wrote:
Moon was produced by head-on collision | Astronomy.com
http://www.astronomy.com/news/2016/0...d-on-collision


The Theia Theory used to talk about a glancing blow between the early
Earth and a Mars-sized Theia, perhaps at 45 degrees. New data suggests
that Theia might have actually hit head-on with the Earth. That's
because the percentage of Oxygen 16/17/18 isotopes between the Earth and
Moon are nearly identical, indicating that they came from the same source.

My question is, if the isotopic evidence which was used to create the
Theia Hypothesis in the first place, due to a previously perceived
difference in isotopic abundances, so now that that isotopic evidence
has disappeared, why keep the Theia Hypothesis? There were other
theories prior to that, which were discarded due to the isotopic evidence.

Yousuf Khan


Thanks for Posting this.


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