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Class 8 : Tunguska and SL-9

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Class 8 : Tunguska and SL-9

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    1. Class 8 : Tunguska and SL-9 A case study of 2 real life collisions… The Shoemaker-Levy 9 meets Jupiter The Tunguska event

    2. The Shoemaker Levy 9 impact of Jupiter

    3. The comet Discovered by Eugene/Carolyn Shoemaker and David Levy on 24th March 1993 Unusual comet – a whole string of nuclei

    4. Why a string of nuclei? Computations of the orbit show that… SL9 came very close to Jupiter in 1992 Close enough for tidal forces to completely rip it to bits SL9 will hit Jupiter in 1994 First ever time that modern scientists could study comet-planet collision

    6. The Impacts

    15. What did we learn? Learned about the structure of comets and the Jovian atmosphere Fragments didn’t penetrate as deep as expected… Plume (mushroom cloud) was higher Ammonia but no water detected in plume Argues for comets being very “weak” Saw dark “dust” from comet itself Spread out and dissipated by winds over course of 5 months Saw aurora in N, even though collisions were in S… transport of energy along Jupiters magnetic field.

    16. The Tunguska Event

    29. What happened? Things to explain… Very large explosion No crater Wild theories Collision of Earth with mini black hole Impact of an antimatter asteroid Mid-air explosion of a UFO. Currently accepted theory mid-air breakup/explosion of small asteroid or comet No crater since object didn’t it ground

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