Where did our moon come from?
Summary
Hosts Emily Kwong and Regina Barber explore the moon’s origin, focusing on the leading giant impact hypothesis involving a Mars-sized body named Thea. They discuss how Apollo samples reveal Earth and the moon share similar compositions, challenging other theories like capture or fission. The episode also examines how the moon serves as an archive of solar system history and highlights future mission goals to study its unexplored far side.
Topics discussed
Intro: Artemis 2 mission and the mystery of the Moon's origin
Ad break and transition to scientific discussion
Competing theories: Co-formation and Moon capture
Evidence from Apollo samples and the fission hypothesis
The Giant Impact Hypothesis: Thea collides with Earth
Thea's origin and implications for Earth's water
The Moon as an archive of deep time and solar history
Future exploration: Near side vs. far side dichotomy
Outro, credits, and sponsor messages
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