From which body were surface samples returned to Earth that contain solar-wind helium-3, an isotope studied as a possible fusion fuel?
Question and options
From which body were surface samples returned to Earth that contain solar-wind helium-3, an isotope studied as a possible fusion fuel?
Mars
Saturn
Venus
Moon
Answer and explanation
Correct answer: D - Moon
Measurements of returned lunar soil detected helium-3 implanted by the solar wind. Helium-3 has been studied as a possible fuel for nuclear fusion.
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