aftwentytwotwentythree

aftwentytwotwentythree - Chapter Twenty two and Twenty...

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Chapter Twenty - two and Twenty - three
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Questions for the Day What is the Milky Way Galaxy? Why is it important to our study of other galaxies? What is a galaxy? What are the different types of galaxies? What is the structure of galaxies? What happens when a galaxy becomes active?
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Caroline Herschel 1750 – 1848 Born in Hannover, Germany She studied mathematics, music, and astronomy Worked with her brother, Herschel http://www.agnesscott.edu/Lriddle/women/herschel.htm
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Work with William in England Moved to England when she was 22 years old Worked on telescope building and mathematical tables Observed comets, nebulae Helped William discover the planet Uranus
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Herschel’s Model of the Galaxy
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The H II Regions of the Milky Way
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The Occurrence of Supernova
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Open Clusters – M 37 Consists of 1000 stars In the plane of the Milky Way Galaxy Formed together in the same nebula Buehler Observatory
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Globular Cluster – Omega Cen Consists of 1,000,000 stars Clusters orbit galaxies. Formed along side the Milky Way Galaxy Buehler Observatory
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Globular Clusters Around the Milky Way
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Spiral Arms of the Sun
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Motion of the Spiral Arms
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http://adc.gsfc.nasa.gov/mw/mmw_product.html#poster
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http://antwrp.gsfc.nasa.gov/apod/image/0012/SgrA_sharp_big.gif Stellar Motion of the Center of the Milky Way Galaxy
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The Milky Way Galaxy http://chandra.harvard.edu/resources/animations/milky_way.html
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NGC 5033: A similar spiral
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What is a Galaxy?
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