Moon's Origin (title provided or enhanced by cataloger)
http://whyfiles.org/shorties/091moon_origin/index.html

Emily Carlson, The Why Files


This article is a Why Files short piece about the origin of our Moon. Approximately 4.5 billion years ago, scientists believe a large planet-sized object (named Theia) hit the Earth, forming the Moon. The article explains some of the pieces that are missing from this theory that would make it more concrete.

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DLESE
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Subject: Geoscience:Lunar and Planetary Science
Grade Level: Middle (6-8), General Public, High School (9-12)
Topics: Solar system