A probe to study the Trojan asteroids is expected to take off this week, but what will this mission uncover about the formation of the solar system? Also, we explore new technology to observe asteroids, as well as a mission to deflect an incoming celestial object. And, we hear from the Nobel co-laureate in Physiology or Medicine, Ardem Patapoutian, about temperature and pressure sensing. Alok Jha hosts. 

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