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March 21, 2005

March 21, 2005. Matter and Energy B Ms. Janney Watkins Mill High School 9th grade “Matter and Energy” and JPL “Solar System Ambassador”. Today is “Sun-Earth Day”. Spring Equinox, aka the “Vernal Equinox” Sun rises exactly in the East and sets exactly in the West

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March 21, 2005

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  1. March 21, 2005 Matter and Energy B Ms. Janney Watkins Mill High School 9th grade “Matter and Energy” and JPL “Solar System Ambassador”

  2. Today is “Sun-Earth Day” • Spring Equinox, aka the “Vernal Equinox” • Sun rises exactly in the East and sets exactly in the West • In the sky for exactly 12 hours

  3. Ancient Observatories • What is an “observatory”? • Why do we use observatories today? • Why would ancient civilizations use observatories?

  4. Archeoastronomy • The study of the astronomical practices, celestial lore, mythologies, religions and world-views of all ancient cultures • After reading this definition, what are some things you already know about this topic?

  5. Ancient Observatories

  6. Patterns in solar observations • What are some patterns that you have observed related to the Sun? • Why do these patterns exist? • How do we use these patterns in our daily lives today? • How did ancient civilizations use these patterns in the past?

  7. Webcast: Ancient Observatories • Before watching this webcast, answer these questions: • What causes the seasons? • When is the Earth closest to the Sun? • Does the Sun always pass overhead in the same place? Does it follow the same path across the sky?

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