1. Important Points See today’s notes: http://mctcteach.org/astronomy/
Objectives, Lecture Summary, Homework
If you haven’t given me a code to use for your grades on the class website, see me after.
2nd D2L Quiz is available. Take the quizzes as often as you want. Not graded.
Show D2L quiz

2. Moon

3. Moon Terminology Terminator Craters Mare Phases Rotation Revolution
Observing Projects:
Moon Phases (starts today)
Moon Craters (starts next week)

4. Motion Everything is in motion Some motion is easy to see, some is not
Earth rotates and revolves in the counterclockwise direction
Moon rotates and revolves in the counterclockwise direction

5. Moon’s Motion
You decide to watch our moon for a few hours one night. Which way does it move in the sky?
1. Toward the east
2. Toward the west
(Show on Starry Night)
Toward west, same as sun

6. What is moving. 1. Moon orbits 2. Earth spins 3
What is moving? 1. Moon orbits 2. Earth spins 3. Both What is moving that predominantly causes the motion you just saw? 3. Sun moves
3 and then 2

7. About how long does Earth take to spin (rotate) once? 1. ~1 hour
2. ~1 day
3. ~1 month
4. ~1 year
2. 1 day

8. About how long does Moon take to orbit (revolve) once around Earth?
1. ~1 hour
2. ~1 day
3. ~1 month
4. ~1 year
3. 1 month

9. Which way does Moon revolve (orbit)?
1. Same direction that Earth spins
2. Opposite direction that Earth spins
(View from space with Solar System simulator)
(Draw it)
same

10. If you watch Moon for a few hours, which motion dominates?
1. Moon’s motion due Earth’s spin (rotation)
2. Moon’s motion due to its own orbit around Earth (revolution)
(Draw it) 1.

11. If you note Moon’s position from one hour to the next, predict if it will move
1. East to west
2. West to east
If you note Moon’s position from one night to the next, predict if it will move
Starry Night for both
1 and then 2

12. Conclusion on Moon’s motion:
Minute to minute the Sun, Moon, stars appear to rise in east and set in west due to Earth’s spin (rotation).
Day to day, Moon moves west to east due to Moon’s orbit (revolution) around Earth

13. How much does Moon move? Add degrees to drawing
About 12 degrees per day: 360/30 days ~ 12deg
Moon rises about 50 minutes later each day

14. Moon Phases What we see from Earth… New Waxing Crescent First Quarter
Waxing Gibbous
Full
Waning Gibbous
Last Quarter
Waning Crescent
What we see from Earth…

15. Moon Phases
What we see from space…

16. Moon Phases
Handout moon phases observation
Orerry with light

17. Moon Phases
Sun
Orerry with light

18. Moon Phases
Drawing/explanation of Phases and Moon location in orbit around Earth Observing Project: Moon Phases

19. Moon Phases Observation
Jan. 22 to Mar 3 to complete
Record phases and location of the Moon over 4 separate dates. Ideally you try to observe 2-4 different phases of the Moon. There are 8 phases of the Moon over ~28 days.
Class website has more details in Moon Phases observation file.
Turn in the Moon Phases Observation sheet (print from the website calendar).

20. Full Moon/Horizon illusion
Full Moon/Horizon illusion. Super Moon is only 10% larger at perigee than apogee
Pass out scratch paper for survey

21. http://antwrp. gsfc. nasa. gov/apod/image/0505/lighthouse_landolfi_big

23. Does the Moon rotate?
We pretty much always see the same side of Moon. There is no dark side of the Moon because all of it gets lit by the sun at some point.

24. Moon’s libration

25. Moon Phases Survey Use scratch paper Write full name
6 multiple choice questions

26. Moon Phases Survey Top view Not to scale Five positions of Moon Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

27. 11. Which position of Moon has the GREATEST amount of sunlight illuminating the Moon’s surface?
a. A
b. B
c. C
d. D
e. They all have the same amount of sunlight illuminating the surface.
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

28. 12. Which position of Moon has the LEAST amount of sunlight illuminating the Moon’s surface?
a. A
b. B
c. C
d. D
e. They all have the same amount of sunlight illuminating the surface.
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

29. 13. The arrow on the right points to one phase of the Moon
13. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

30. 14. The arrow on the right points to one phase of the Moon
14. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

31. 15. The arrow on the right points to one phase of the Moon
15. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E
Moon images from

32. 16. In the moon phase pictures on the right, what causes Moon to change its appearance this way?
As Moon orbits Earth, Earth’s shadow covers Moon.
Clouds block part of Moon from our view.
c. As Moon orbits Earth, we see different views of Moon’s sunlit side.

33. Moon Survey Answers

34. 11. Which position of Moon has the GREATEST amount of sunlight illuminating the Moon’s surface?
a. A
b. B
c. C
d. D
e. They all have the same amount of sunlight illuminating the surface.
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

35. 12. Which position of Moon has the LEAST amount of sunlight illuminating the Moon’s surface?
a. A
b. B
c. C
d. D
e. They all have the same amount of sunlight illuminating the surface.
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

36. 13. The arrow on the right points to one phase of the Moon
13. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

37. 14. The arrow on the right points to one phase of the Moon
14. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E

38. 15. The arrow on the right points to one phase of the Moon
15. The arrow on the right points to one phase of the Moon. Which position in the drawing below corresponds to that phase?
Sun
Earth
Sunlight
NOT TO SCALE
Moon’s Orbit A B C D E
Moon images from

39. 16. In the moon phase pictures on the right, what causes Moon to change its appearance this way?
As Moon orbits Earth, Earth’s shadow covers Moon.
Clouds block part of Moon from our view.
c. As Moon orbits Earth, we see different views of Moon’s sunlit side.

40. 7 Observation Projects Planetarium (10 points)
Sunset – Part 1  (10 points)
Moon Phases  (10 points)
Safe Sun Prep Work  (10 points)
Sunset – Part 2  (10 points)
Moon Craters  (10 points)
Star Gazing  (10 points)
Telescope  (10 points)
TOTAL POINTS = 80
Note 2 moon related observations**

41. Sunset Part 1 Observation
Jan. 20 to Feb. 12 to complete
Take a picture of the sunset with 30o open region to the right of the sun (spring sunset). Use fist method (arm outstretched) to measure 30o (3 fist lengths) to the right/north of sunset now.
Specific directions on website for what you need to write down.
Turn in the picture with details listed in the calendar sunset observation file.
Part 2: Apr. 2 to Apr. 28 to complete the 2nd picture in EXACT SAME SPOT

42. 7 Observation Projects
OBSERVING PROJECTS (All 7, in order of due date)
Planetarium (Exploradome at MCTC): Feb. 3
Sunset – Part 1 Start: Jan. 20; Due: Feb. 12
Moon Phases Start: Jan. 22; Due: Mar. 3
Safe Sun Prep Work Start: Mar. 19; Due: Mar. 26+
Sunset – Part 2 Start: Apr. 2; Due: Apr. 28
Moon Craters Start: Jan. 29; Due: May 5
Star Gazing Start: Jan. 29; Due: May 5
Telescope Start: Jan. 29; Due: May 5