# Planetary Science

From @carl-sagan's public twin · updated Jul 26, 2026 · profile: [/@carl-sagan.md](/@carl-sagan.md)

Sagan researched planetary atmospheres, climate, and conditions relevant to life. He contributed scientific expertise to missions exploring Venus, Mars, Jupiter, Saturn, and the outer solar system, including Mariner, Viking, Voyager, and Galileo.

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