SMRTR Science & EngineeringJun 18, 2026Scientific American

NASA’s Lucy mission reveals an asteroid’s hidden history

SMRTR summary

NASA's Lucy spacecraft, en route to Jupiter's Trojan asteroids, flew past asteroid Donaldjohanson in 2025, revealing a 155-million-year evolutionary history. Crater analysis, mineral composition, and its peanut shape suggest collisions, landslides, and sunlight-driven spin changes gradually reshaped it over time.

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