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Chapter 18 Section 1 Astronomy: The Original Science

Chapter 18 Section 1 Astronomy: The Original Science. 1 Describe two early ideas about the structure of the universe. 2. Describe the contributions of Brahe, Kepler, Galileo, Newton, and Hubble to modern astronomy. Log: Sept. 20th.

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Chapter 18 Section 1 Astronomy: The Original Science

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  1. Chapter 18Section 1Astronomy: The Original Science 1Describe two early ideas about the structure of the universe. 2. Describe the contributions of Brahe, Kepler, Galileo, Newton, and Hubble to modern astronomy

  2. Log: Sept. 20th • Suppose that you need to explain the concepts of a year, a month and a day to a small child. Write a paragraph and draw a picture describing the motion of the earth.

  3. Year- the time it takes the earth to orbit the sun Our Modern Calendar

  4. Day • The circumference of the Earth at the equator is 25,000 miles. • The Earth rotates in about 24 hours. • Therefore, if you were to hang above the surface of the Earth at the equator without moving, you would see 25,000 miles pass by in 24 hours, at a speed of 25000/24 or just over 1000 miles per hour.

  5. Day- the earth rotates once on its axis

  6. Month- the time it takes the moon to orbit the earth

  7. Ptolemy (Toleme) Greek astronomer Earth center of universe Copernicus Polish Sun centered universe Early Astronomy

  8. Tycho Brahe Danish Astronomer Late 1500s Sun and moon revolved around the Earth Other planets revolved around the sun Johannes Kepler (yo hon ees) Brahe’s Assistant All planets revolved around the sun in a elliptical orbit Laws of Planetary Motion

  9. 1st law • I. The orbits of the planets are ellipses, with the Sun at one focus of the ellipse.

  10. Galileo: Telescope • One of the first to use a telescope • Discovered • Sun spots • Craters & mountains on moon • Planets are not wandering stars

  11. Isaac Newton • Explained the laws of gravity • Gravity depends on mass

  12. Edwin Hubble • 1924 • Proved other galaxies exist beyond milky way

  13. Log: Sept. 21st • Describe month, day and year. • If you need trade with someone and evaluate their Buried Treasure Directions • Start DR

  14. Fold CHart

  15. Log: Sept. 22nd • Create a time line using the astronomers that we have learned about. Use you text to find what year the wrote their theories. Ptolemy Galileo Tycho Kelpler Copernicus Hubble Newton What instrument did Tycho use to make discoveries?

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