Introductio1 - if we are lucky, the models are getting...

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Introduction: What is Astronomy ? o a science - includes physics, chemistry, geology, biology . .. o a human experience - beauty, inspirer of poetry and song   Definition: o The study of the Universe. What is it ? . ......................  Observation How does it work ? . ............  Understanding   Related ideas: (not covered here) o philosophy / religion . .................... Why  is there a Universe ? o astrology . .................................  How does the Universe guide our lives (if it does) ? Scientific Method: Science => Scientific Method o Observation o Hypothesis o More Observation o Theory Explains all existing observations predicts new phenomena o More Observation If Observations disagree with theory o check observation for validity o get a new theory Scientists do  not  deal with "truth" o work with models o models change as we learn more o
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Unformatted text preview: if we are lucky, the models are getting closer to the truth Observation What can WE see ? (with our eyes but no telescopes) lots of astronomy was developed before telescopes OBJECT MOTION COMMENTS 1. stars fixed with respect to one another, slowly rotate together individual stars, clusters, Milky Way 2. moon moves quickly with respect to the stars large, changes shape in a repeating pattern 3. planets (wanderers) move slowly with respect to the stars sometimes move backwards 4. comets move slowly with respect to the stars long tails, appear suddenly 5. meteors move VERY quickly very bright, short lived 6. Sun moves quickly with respect to other stars in daytime sky, very bright 7. man-made satellites move very quickly 8. empty space not really so empty !...
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Introductio1 - if we are lucky, the models are getting...

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