3. Astro HW Prev & Ch1 DT © 2012

4. Preview Ch – Q’s 4 Review Solar System, Milky Way Galaxy, Local Group (of galaxies), Virgo Supercluster, Universe

5. Preview Ch – Q’s 4 Review Duh… Gravity

6. Preview Ch – Q’s 4 Review Lots

8. Preview Ch – Q’s 4 Review 100,000 ly

9. Preview Ch – Q’s 4 Review 1.5x10 11 m 150,000,000,000m 93,000,000 miles

10. Preview Ch – Q’s 4 Review Distance light travels in a year 1x10 16 m 6,000,000,000,000,000 miles

11. Preview Ch – Q’s 4 Review Protons, Neutrons, Electrons

12. Preview Ch – Q’s 4 Review Electrostatic Force

13. Preview Ch – Q’s 4 Review An organized step-by-step process of getting an answer – Observation (See Something) – Hyppopotamoose (Take a guess why you saw it) – Experimentation (Test it) – Theory (Revise your Hypotenuse) – Conclusion (Yeah, you got it)

14. Preview Ch - Problems Did it!

15. Preview Ch - Problems

16. Sun is 108 times bigger. – Sun = 0.2 x 108 = 21.6 cm MWG is WOWZERS bigger... – MWG = 100,000 ly

20. Preview Ch - Problems Yeah, right… – Let’s try it with TP later…

21. Preview Ch - Problems OH, STOP IT!

22. Preview Ch - Problems

27. Preview Ch – Test Yourself

34. Ch 1 – Q’s 4 Review 1.Imaginary sphere (ball) surrounding the earth showing where the stars are. 2.A group of stars that are NOT RELATED that just happen to form a shape to an idiot. 3.Zodiac is the group of constellations located along the sun’s ecliptic (path) on the celestial sphere.

36. Ch 1 – Q’s 4 Review 4. Path of the sun on the celestial sphere. 5. DUH! Tilt of earth’s axis of rotation allowing for uneven distribution of light and heat from the sun.

38. Ch 1 – Q’s 4 Review 6. NY has summer. April in Paris? What? 7. Along the ecliptic.

40. Ch 1 – Q’s 4 Review 8. 28 days. 9.

41. Ch 1 – Q’s 4 Review 10. Duh! EVERYTHING rises in East and sinks in West! 11. Planets don’t “twinkle”

42. Ch 1 – Q’s 4 Review Aristotle: Not much. Got just about everything wrong. Aristarchus: Estimated relative sizes of earth, Moon, & Sun, and relative distances to Moon & Sun. Eratosthenes: Measured C of earth. Ptolemy: Geocentric view Copernicus: Heliocentric view Tycho: Provided data Kepler needed

43. Ch 1 – Q’s 4 Review Kepler: Made 3 Laws of Planetary Motion (More on them later…) Galileo: Proved Copernicus was write (Found moons orbiting Jupiter and saw phases of Venus) Newton: Tied all of Kepler’s Laws and Galileo’s observations together with math proofs.

44. Ch 1 – Q’s 4 Review 13. Angle made by looking at something. 14. Thirds. Duh!

52. Ch 1 – Problems

54. Yeah, right… Later…

55. Ch 1 – Problems

62. Ch 1 – Test YoSeff