NASA Artemis Seeks New Moon Samples to Test 4.5 Billion-Year Origin Theory

3 articles · Updated · spacedaily.com · Jun 22

NASA’s Artemis program plans to bring back lunar samples from regions Apollo never reached, targeting evidence that could sharpen or overturn competing models of the Moon’s formation.
382 kilograms of Apollo rocks tied lunar chemistry closely to Earth’s, supporting the giant-impact theory that a Mars-sized body struck the proto-Earth about 4.5 billion years ago.
That evidence also exposed a key problem: lunar oxygen isotopes almost perfectly match Earth’s, even though a simple impact should have left the Moon carrying more of the impactor’s signature.
Researchers now favor more violent collision scenarios that would have vaporized and thoroughly mixed both bodies, while the Moon’s precise age and the isotope puzzle remain unresolved.
Beyond origin questions, the Moon clearly drives tides and has slowed Earth’s rotation, while claims that it was essential for complex life remain a debated hypothesis.