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Comets are cosmic time capsules, but some carry stories from far beyond our Solar System. Join us for a live discussion on Comet 3I/ATLAS, the third known interstellar object to visit our cosmic neighborhood. Host Simon Steel, Deputy Director of the Carl Sagan Center at the SETI Institute, will be joined by a panel of experts to explore what makes this comet unique, how scientists are studying it, and what its presence means for our understanding of planetary systems beyond our own.
Guests include:
Don't miss this chance to learn how astronomers are racing to study this rare visitor before it slips back into the void.
(Recorded live 11 July 2025.)
By SETI Institute4.5
66 ratings
Comets are cosmic time capsules, but some carry stories from far beyond our Solar System. Join us for a live discussion on Comet 3I/ATLAS, the third known interstellar object to visit our cosmic neighborhood. Host Simon Steel, Deputy Director of the Carl Sagan Center at the SETI Institute, will be joined by a panel of experts to explore what makes this comet unique, how scientists are studying it, and what its presence means for our understanding of planetary systems beyond our own.
Guests include:
Don't miss this chance to learn how astronomers are racing to study this rare visitor before it slips back into the void.
(Recorded live 11 July 2025.)

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