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|The content of Theia (planet) was merged into Giant-impact hypothesis. For the contribution history and old versions of the redirected page, please see ; for the discussion at that location, see its talk page. (31 March 2009)|
|The content of Theia (Planet) was merged into Giant-impact hypothesis. For the contribution history and old versions of the redirected page, please see ; for the discussion at that location, see its talk page. (31 December 2013)|
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Basic model problems
The Basic Model section says:
Astronomers think the collision between Earth and Theia happened at approximately 4.4 and 4.45 bya; about 30–50 million years after the Solar System began to form.
This is conflating two theories: old-moon and young-moon. The old-moon theory has the impact occurring at 4.53 ga, or about 38 million years after the date for the CAIs (Calcium–aluminium-rich inclusion) which is taken as a substitute for the age of the solar system and the beginning of the formation of the earth. The young moon theory was originally 4.45-4.47 but has since been revised to 4.47 ga. This was originally supported by re-analysis of Apollo 12 moon rocks, but has been independently corroborated by material from meteorites containing debris from the collision. Zyxwv99 (talk) 19:19, 14 April 2016 (UTC)
Theia, Thea as separate pages
The header at the top of the page says that Theia (planet) redirects here, but since 2013 it has had its own article. The spelling variation Theia (Planet) redirects there. On the other hand, Thea (planet) redirects here. I'm not proposing a resolution, just asking what people think the optimum solution would be. -- Elphion (talk) 23:33, 30 April 2016 (UTC)
possibility of giant impact
how was the main body and condition of Earth crust , when giant impact occurred?
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