Exploring New Worlds: Dr. Sara Seager on Venus, Exoplanets, and Life Among the Clouds

In this episode of Red Planet Live, MIT astrophysicist Dr. Sara Seager takes us on a breathtaking journey through the frontiers of planetary science—from the acid clouds of Venus to the icy oceans of Enceladus, and even the methane lakes of Titan.

Dr. Seager reveals why Venus, often overlooked, is one of the most thrilling destinations for future missions. She discusses the possibility of life within its sulfuric acid clouds, where stable biomolecules could persist despite the harsh chemistry. Her team’s latest findings continue to show a phosphine signal with 4.8-sigma confidence, renewing excitement about potential biological activity in our neighboring planet’s skies.

We also explore the power of small but mighty missions, including Rocket Lab’s upcoming Venus probe and Asteria, the CubeSat that proved precision astronomy can thrive on a shoestring budget. Dr. Seager shares her insights on TESS, the Transiting Exoplanet Survey Satellite, which at its peak was discovering up to 100 planet candidates a month—a quiet revolution in the search for other worlds.

From Sub-Neptune exoplanets like K2-18b, showing signs of life with dimethyl sulfide in its hydrogen-rich atmosphere, to her visionary idea of Starshade, a large space telescope, Dr. Seager paints a hopeful picture of humanity’s search for life beyond Earth.

We also touch on her Seager Equation—a parallel to the Drake Equation—and her book The Smallest Lights in the Universe, which reminds us that discovery is as much about human connection as it is about science.

Join us as we uncover why the most “underdog” worlds—and missions—often hold the brightest potential for discovering life in the cosmos.

Dr. Sara Seager's Links:

https://www.saraseager.com/professionalbiography

Venus :  https://www.morningstarmissions.space/

https://www.projectstarshade.com/

Sara's memoir The Smallest Lights in the Universe: A Memoir

https://www.amazon.com/Smallest-Lights-Universe-Memoir/dp/0525576258