Unit

1
Unit2 Motions of the Earth, Moon and Sun
2
What do you think?

• In one well-written paragraph, explain why we see
  different phases of the moon.
• Write your name and place any diagrams on the
  back of the paper.

3
Astronomy in Ancient SocietiesWhy did people
watch the sky?

• Navigation at Night
• Time of Day
• Marking the Seasons
• Calendars
• Major part of religion

4
Observations/Observatories

• Chinese recorded observations 5000 years ago
• Mayan observatory with viewing holes

5
What can you see with the unaided eye?

• Which of the following dates would have the Sun
  above the horizon for the most hours?
• March 21
• June 22
• September 22
• December 23

6
What can you see with the unaided eye?

• Which of the following dates would have the Sun
  above the horizon for the most hours?
• March 21
• June 22
• September 22
• December 23

7

• In which direction is the Sun at noon in the
  winter?
• East
• South East
• South
• South West
• West

8

• In which direction is the Sun at noon in the
  winter?
• East
• South East
• South
• South West
• West

9

• Suppose the Sun rises due east. When will the Sun
  next rise due east?
• Tomorrow
• Six months
• A Year
• Never

10

• Suppose the Sun rises due east. When will the Sun
  next rise due east?
• Tomorrow
• Six months
• A Year
• Never

11

• If you see the Moon rise tonight at 900 p.m.,
  approximately what time will it rise tomorrow
  night?
• 800 p.m.
• 900 p.m.
• 1000 p.m.
• 1100 p.m.

12

• If you see the Moon rise tonight at 900 p.m.,
  approximately what time will it rise tomorrow
  night?
• 800 p.m.
• 900 p.m.
• 1000 p.m.
• 1100 p.m.

13

• Approximately how many hours of daylight do you
  get in the summer?
• Less than 12
• Exactly 12
• 12 to 16
• Over 16

14

• Approximately how many hours of daylight do you
  get in the summer?
• Less than 12
• Exactly 12
• 12 to 16
• Over 16

15

• How much time is there between full Moons?
• A day
• A month
• Three months
• A year

16

• How much time is there between full Moons?
• A day
• A month
• Three months
• A year

17
Movement of the Moon

• The moon moves east to west across the sky each
  night
• The moon rises one hour later than the precious
  night
• The moon goes through phases over a 29.5 day
  period from full moon to full moon
• The moon waxes (builds) to the right.
• A full moon rises exactly at sunset
• We always see the same face of the moon because
  it rotates on its axis at about the same speed at
  which revolves around the earth.
• The moon moves counter clockwise around the earth.

18
Motion in the Solar System

• The Moon has two relevant periods were
  interested in the former
• 29.5 days between new moons (moon directly
  between us and the sun)
• Only 27.3 days until it reappears in the same
  place relative to the stars.

19
Phases of the Moon
20
Calendars and the Lunar Month/Year
Credit The Simpsons
21
Lunar Eclipses
Alignment of the Sun, Moon, and Earth ?
Shadows Shadows are responsible for eclipses, NOT
PHASES OF THE MOON
MrEclipse.com
22
Lunar Eclipses
23
Solar Eclipses
24
Predicting Eclipses
25
Rotation of the Sky During the Night
Click Here