A NASA spacecraft returned its first samples from a near-Earth asteroid, delivering pristine material that has been shielded from Earth's atmosphere and contamination. Scientists will study the grains for clues about the chemistry of the early solar system and the origins of water and organic molecules.
Sample-return missions are rare and technically demanding: the payoff is material that laboratories can analyse for decades with instruments far more sensitive than anything a spacecraft can carry. Early findings often reshape models of how planets — and the ingredients for life — came together.
Why it matters: Hands-on asteroid material is a direct window into the solar system's formation, and a proof point for the precision needed in future deep-space missions.
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