Comets and Stardust Astronomy Club December 13 th, 2006.

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Presentation transcript:

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 –Always points away from Sun Solar Wind and Radiation Pressure Comet Hale-Bopp

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

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

Bayeaux Tapestry Norman Invasion of 1066 Comet Halley

Hale-Bopp

Hyakutake

Hale-Bopp

Comet West

Comet Wild 2

Stardust

Stardust Spacecraft

Launched on Feb. 7, 1999 by NASA

Encounter January 2004 Earth Return January 2006

Aerogel

Sample Return Capsule & Collector Grid

Home! 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: tutorial_start.php tutorial_start.php

For more information Minor-Bodies.pptwww.physics.sfasu.edu/markworth/ast105/ Minor-Bodies.ppt 12/DLN/descriptions/presentations/sb_co met_wild_2_stardust.ppthttp:// 12/DLN/descriptions/presentations/sb_co met_wild_2_stardust.ppt Wikipedia