2. OBSERVING THE SKY Chapter 1 Chapter 3

3. Constellations and Navigation Constellations and Navigation ORIGINS OF ASTRONOMY

5. CELESTIAL SPHERE

6. FLASHCARDFLASHCARD Let’s say we find a star that is located on the points or circles in the sky listed below.Then on the same night we move to a location that is some significant distance from our first location. There will now be a different star on A) the celestial north pole B) the zenith C) the celestial equator D) all of the above

7. APPARENT SKY ROTATION

8. STAR CIRCLES

9. STAR TRAILS NEAR THE POLE

10. EQUATORIAL STAR TRAILS

11. INTERMEDIATE LATITUDE STAR TRAILS

12. FLASHCARDFLASHCARD Imagine Canadian troops are stationed in a country located on the equator. Which of the following would be familiar to them (the same at the equator as in Canada)? A) the celestial poles are on the north and south points of the horizon B) the celestial equator is overhead and passes through the zenith C) all stars rise and set D) none of the above are the same on the equator as in Canada

13. STAR TRAILS

14. FLASHCARDFLASHCARD ALL CONSTELLATIONS NORTH OF WHAT LATITUDE ARE CIRCUMPOLAR FROM VANCOUVER? (Latitude of Vancouver is 49 degrees) A) 0 degrees B) 41 degrees C) 49 degrees D) 90 degrees

15. EARTH’S PRECESSION

18. ORIGINS of ASTRONOMY Constellations and Navigation Constellations and Navigation Constellations and Timekeeping Constellations and Timekeeping ä ä Daily rotation of sky is a unit of time = 1 day

21. FLASHCARDFLASHCARD FOR ABOUT HOW LONG WAS THE CAMERA OPEN IN THIS PICTURE? A) 30 seconds B) 5 minutes C) 2 hours D) 5 hours

22. The Spinning Earth How do we know that the Earth is spinning on its axis? Is it not possible that the Earth does not spin and the sky spins around the Earth?

23. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere

24. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere ä Foucault Pendulum

25. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere ä Foucault Pendulum ä Velocity of Moon at Rising and Setting

26. PHASES of the MOON

28. FLASHCARDFLASHCARD AT WHAT TIME DOES THE WAXING CRESCENT MOON SET? A) 9:00 AM B) 3:00 PM C) 9:00 PM D) MIDNIGHT

29. FLASHCARDFLASHCARD AT WHAT TIME DOES THE FIRST QUARTER MOON RISE? A) 9:00 AM B) NOON C) 9:00 PM D) MIDNIGHT

30. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere ä Foucault Pendulum ä Velocity of Moon at Rising and Setting

31. PHASES of the MOON

32. ECLIPSE GEOMETRY New New NewNew 5º5º5º5º Full Full FullFull Earth’s Orbit

33. ECLIPSE GEOMETRY

34. FLASHCARDFLASHCARD WHAT IS THE SHORTEST POSSIBLE PERIOD OF TIME BETWEEN A SOLAR AND A LUNAR ECLIPSE? A) 1 Day B) 1 Week C) 2 Weeks D) 1 month

35. SOLAR ECLIPSE GEOMETRY

36. SOLAR ECLIPSE

37. SOLAR ECLIPSE 2008

39. LUNAR ECLIPSE

40. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere ä Foucault Pendulum ä Velocity of Moon at Rising and Setting ä Long Range Projectiles

41. EARTH SPINS on its AXIS l Evidence of Earth’s Spin ä Daily rotation of Celestial Sphere ä Foucault Pendulum ä Velocity of Moon at Rising and Setting ä Long Range Projectiles ä Prevailing Wind Circulation

42. CONCLUSIONS REGARDING SPIN of EARTH Earth rotates once per day from west to east (counter-clockwise as seen from above the north pole) about an axis that passes through the north and south poles. Celestial sphere North celestial pole South celestial pole Celestial equator