Perseverance, NASA's latest Mars rover, is a one-ton, $2 billion marvel. The plan was for it to enter the Mars atmosphere going 12,000 miles an hour. The problem: How do you slow it down enough to set it down gently on the surface? You can't use retro rockets, because they'd stir up so much dust, the rover’s cameras and instruments would be ruined. You can’t deliver Perseverance inside a larger spaceship, because the rover wouldn’t be able to drive out of the landing crater. You can’t even control the descent from Earth, because it takes so long for our signals to reach Mars; by the time the rover received a course-correction instruction, there’d be nothing left of it but a smoking wreck. Yet NASA pulled it off—with a nutty, Rube Goldberg-y, multi-stage, seven-minute-long, completely automated system involving a parachute, an airborne launch platform, and a cable.
Guest: Alan Chen, NASA Entry, Descent, and Landing Lead for the Mars 2020 mission.
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Bob Saget's Here For You
BOB SAGET’S HERE FOR YOU is a podcast that is like no other— For one, this podcast has guests who are friends of Bob’s, or just really interesting people who many of you know and love. Secondly, this podcast is unique because it goes inside Bob Saget’s mind, and then quickly filters out through his mouth. Bob has a way of calming people he has conversations with as well as being entertaining and often informative. Bob talks with his guests with genuine empathy and humor, while reaching his unusually diverse audience that he talks to as a friend, Bob is the dad with great advice, the irreverent funny guy who’s always there when you need a laugh, and the free-associative Bob who goes off on crazy tangents then returns to the subject at hand, as serious or as comedic as it may be, to wrap up each episode in a way only Bob can do. Because he really does believe, “He’s here for you."
Current and classic episodes, featuring compelling true-crime mysteries, powerful documentaries and in-depth investigations.