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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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- Spring '10