ReThinking Searching for life on other planets with astrophysicist Sara Seager
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Feb 17, 2026 
Sara Seager, astrophysicist and exoplanet pioneer, explains how scientists find planets around other stars and why that matters. She discusses transit detection, AI’s role in sifting data, and where to look for simple life nearby. They debate the odds of intelligent life and the practical limits of searching the galaxy.
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Childhood Shaped Scientific Mindset
- Sara recounts a difficult childhood split between a mean stepfather and an unconventional father who loved reincarnation ideas.
- That mix gave her distrust of authority and openness to unusual ideas, which she credits for fueling her scientific approach.
Early Gamble On A New Field
- Sara Seager chose graduate school in astronomy and jumped into exoplanet research when the field was brand new in the mid-1990s.
- Her advisor gave her a risky project and that early gamble launched her career discovering planets beyond our solar system.
Transit Method Drives Discoveries
- The dominant method for finding exoplanets is detecting tiny periodic dips in starlight when planets transit their stars.
- Because alignment is rare, astronomers must monitor hundreds of thousands to millions of stars continuously.
