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Comets and Stardust

Comets and Stardust. Astronomy Club December 13 th , 2006. Structure of a Comet. Ion Tail. Dust Tail. Coma. To Sun. Comet Composition. Nucleus 10 km “Dirty Snowball” Rocks and ice Coma – gas around the nucleus Cloud of evaporated ices and ions may be 100,000 km in diameter Tail

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Comets and Stardust

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  1. Comets and Stardust Astronomy Club December 13th, 2006

  2. Structure of a Comet Ion Tail Dust Tail Coma To Sun

  3. Comet Composition • Nucleus • 10 km “Dirty Snowball” • Rocks and ice • Coma – gas around the nucleus • Cloud of evaporated ices and ions • may be 100,000 km in diameter • Tail • Always points away from Sun • Solar Wind and Radiation Pressure Comet Hale-Bopp

  4. 1997—Comet Hale-Bopp Can you spot the coma, gas tail, and curved dust tail?

  5. The Oort Cloud • Birthplace of long-period comets • there is no preferential direction from which comets come. • Consists of debris left over from the condensation of the solar nebula

  6. Bayeaux TapestryNorman Invasion of 1066 Comet Halley

  7. Comet Halley

  8. Hale-Bopp

  9. Hyakutake

  10. Hale-Bopp

  11. Comet West

  12. Comet Wild 2

  13. Stardust

  14. Stardust Spacecraft

  15. Launched on Feb. 7, 1999 by NASA

  16. Encounter January 2004 Earth Return January 2006

  17. Aerogel

  18. Sample Return Capsule & Collector Grid

  19. Stardust @ Home! • http://stardustathome.ssl.berkeley.edu/ • Help scientist to find stardust particles in the gel slides  save time • “By asking for help from talented volunteers like you … we can do this project in months instead of years. “ • This is a tutorial: http://stardustathome.ssl.berkeley.edu/ss_tutorial_start.php

  20. For more information • http://stardustathome.ssl.berkeley.edu/ • www.physics.sfasu.edu/markworth/ast105/Minor-Bodies.ppt • http://www.grc.nasa.gov/WWW/K-12/DLN/descriptions/presentations/sb_comet_wild_2_stardust.ppt • Wikipedia 

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