Calendar

Oct
25
Fri
Colloquium: Shun Karato (Host: Jason Jackiewicz)
Oct 25 @ 3:15 pm – 4:15 pm
Colloquium: Shun Karato (Host: Jason Jackiewicz) @ BX102

Solving the Puzzles of the Moon

Shun Karato, Yale University

After 50 years from the first landing of men on the Moon, about 380 kg of samples were collected by the Apollo mission. Chemical analyses of these samples together with a theory of planetary formation led to a “giant impact” paradigm (in mid 1970s). In this paradigm, the Moon was formed in the later stage of Earth formation (not the very late stage, though), when the proto-Earth was hit by an impactor with a modest size (~ Mars size) at an oblique angle. Such an impact is a natural consequence of planetary formation from a proto-planetary nebula. This collision may have kicked out mantle materials from the proto-Earth to form the Moon. This model explains mostly rocky composition of the Moon and the large angular momentum of the Earth-Moon system. High temperatures caused by an impact likely removed much of the volatile components such as water.

However, two recent geochemical observations cast doubt about the validity of such a paradigm. They include (i) not-so-dry Moon suggested from the analysis of basaltic inclusions in olivine, and (ii) the high degree of similarities in many isotopes. The first observation is obviously counter-intuitive, but the second one is also hard to reconcile with the standard model of a giant impact, because many models show that a giant impact produces the Moon mostly from the impactor. In this presentation, I will show how one can solve these puzzles by a combination of physics/chemistry of materials with some basic physics of a giant impact.

Oct
28
Mon
Pizza Lunch: Sultan Hassan
Oct 28 @ 12:30 pm – 1:30 pm
Pizza Lunch: Sultan Hassan @ AY 119

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Nov
1
Fri
Colloquium: OPEN (Host: TBD)
Nov 1 @ 3:15 pm – 4:15 pm
Colloquium: OPEN (Host: TBD) @ BX102

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Colloquium Speaker Name, Affiliation

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Nov
4
Mon
Pizza lunch: Laurel Farris
Nov 4 @ 12:30 pm – 1:30 pm
Pizza lunch: Laurel Farris @ AY 119

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Nov
8
Fri
Colloquium: Jacob Vander Vliet (Host: Chris Churchill)
Nov 8 @ 3:15 pm – 4:15 pm
Colloquium: Jacob Vander Vliet (Host: Chris Churchill) @ BX102

Colloquium Title

Jacob Vander Vliet, NASA/SOFIA

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Nov
11
Mon
Pizza lunch: Moire Prescott
Nov 11 @ 12:30 pm – 1:30 pm
Pizza lunch: Moire Prescott @ AY 119

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Nov
15
Fri
Colloquium: Dr Phil Judge, High Altitude Observatory (Host, Dr James McAteer)
Nov 15 @ 3:15 pm – 4:15 pm

Colloquium Title

Phil Judge, High Altitude Observatory, Boulder CO.

https://tinyurl.com/PhilJudge

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Nov
18
Mon
Pizza lunch: Nancy Chanover
Nov 18 @ 12:30 pm – 1:30 pm
Pizza lunch: Nancy Chanover @ AY 119

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Nov
22
Fri
Colloquium: Rixin Li (Host: Wladimir Lyra)
Nov 22 @ 3:15 pm – 4:15 pm
Colloquium: Rixin Li (Host: Wladimir Lyra) @ BX102

Colloquium Title

Rixin Li, University of Arizona

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Nov
29
Fri
No Colloquium: Thanksgiving
Nov 29 @ 3:15 pm – 4:15 pm
No Colloquium: Thanksgiving @ BX102

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Colloquium Speaker Name, Affiliation

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