2. The Moon
China landing on moon 1/2/2019

3. The Moon The Moon is Earth’s only natural satellite
It is estimated to be about 4.5 billion years old

4. weathering, erosion, atmosphere Why is Earth not like this?
Craters
Why so many?
What are these?
No atmosphere
weathering, erosion, atmosphere
Why is Earth not like this?

5. The Moon’s interior is thought to have layers, similar to earth
Features
The Moon’s interior is thought to have layers, similar to earth

6. The Moon’s Surface
Dark areas called Maria (from Latin mare, meaning sea). These are ancient lava flows.
Light areas are Lunar Highlands, which are mountain ranges made of lighter color rocks.

7. Moon Rocks
Rocks on the Moon are made of minerals similar to those on Earth.

8. 27.3 days How long does one revolution of the moon take? How long does
one rotation of
the moon take?
ESRTs p15

9. What phenomenon
does this explain?
We only ever see one
side of the moon.

10. However, it takes 29.5 days for the Moon to complete one phase cycle.

11. Why??
Moon’s orbit
Moon has to revolve for 2 more days to get back to the new moon phase.
Earth
Moon

12. Phases
of the
Moon

13. Dark Side/Light Side

14. Changes in Shape

15. Phases
Moon Phases are apparent changes in shape due to the position of the Moon in its orbit.

16. Phases Of The Moon

17. What causes the phases of the moon? The moon's revolution
around Earth. 18

18. What phase of the moon is this?
New
Gibbous
New
Crescent
3rd
Quarter

19. What is "waxing"?
more of the moon's
surface can be seen

20. What is "waning"?
less of the moon's
surface can be seen

21. Regents Question
Which sequence of Moon phases could be observed from Earth during a 2-week period?

22. Regents Answer

23. Why does the moon
rise later each day?
because as the Earth
rotates, the moon
revolves

24. Approximate Times of Moonrise and Moonset
 moonrise   
moonset
new moon
06:00 AM
06:00 PM
waxing crescent
09:00 AM
09:00 PM
first quarter
12:00 PM
12:00 AM
waxing gibbous
03:00 PM
03:00 AM
full moon
waning gibbous
third quarter
waning crescent
How many hours is the
moon visible each day?
12 hours

25. The phases of the
moon are what type
of event?
Cyclic

26. Leap Year!
It takes the Earth about 365 days, 5 hours, 49 minutes and 16 seconds to orbit the sun, so (almost) every four years, a day is added to keep the calendar in sync with the seasons. Occasionally, the calendar will leap the leap day to adjust for the fact that the extra time isn’t exactly six hours per year. (And lets not even get into leap seconds.)
The uneven numbers create an interesting situation for people born on Feb. 29 — leapers. For legal purposes, their birthdays will be on either Feb. 28 or March 1 in non-leap years — which depends on the country they’re in.

27. Tides

28. Tides & Eclipses
Astronomy

31. What causes
tides?

32. Moon’s Effect on Tides
Tides are the periodic rise and fall of the ocean surface
Tides are caused by the gravitational attraction of the Moon and the Sun on ocean water
High tide will occur on the side of the Earth that is facing the Moon as well as on the opposite side of the Earth.

33. Tides Caused by Moon’s gravity pulling Earth’s water.
Low
Earth
High
High
**Tides always High in line with Moon.
Low

34. How many tides a day?
2 high tides
2 low tides

35. Why are there not exactly
12 hours between tides?
because the moon
revolves around
the Earth while the
Earth rotates

36. Regents Question
The change in the tides as shown on the graph is primarily the result of
Earth’s rotation and the Moon’s revolution
Earth’s rotation and revolution
The Moon’s rotation and Earth’s revolution
The Moon’s rotation and revolution

37. Earth’s rotation and the Moon’s revolution
Regents Answer
Earth’s rotation and the Moon’s revolution

38. Phases and Tides
Special tides occur when the Sun’s gravitational field also interacts with the Moon’s gravitational field.

39. New and Full Phase – Extreme .high and low tides.
Spring Tides
Sun
Earth
New and Full Phase – Extreme .high and low tides.
Moon’s and Sun’s gravities pulling in one direction.

40. New or Full Moon
Spring?

41. Neap Tides Causes weaker tides called During Quarter Phases – Earth
Water being pulled
in two directions.
Causes weaker tides called
Neap Tides

42. 1st & 3rd Quarters
Neap?

43. Regents Question
What is the main reason that the gravitational attraction between Earth and the Moon changes each day?
Earth’s axis is tilted at 23.5○.
Earth’s rotational speed varies with the seasons.
The moon has an elliptical orbit.
The moon has a spherical shape.

44. The moon has an elliptical orbit.
Regents Answer

46. solar and lunar eclipses
Why don’t we have
solar and lunar eclipses
every month?
The moon’s orbit is
tilted 5° from the
Earth’s orbit.

47. solar and lunar eclipses?
What’s the
difference between
solar and lunar eclipses?
Solar
Lunar
Earth goes
into moon’s
shadow
moon goes
into Earth’s
shadow

48. When does a solar eclipse occur?
at new moon phase.

49. Solar Eclipse Only total eclipse if in the umbra. Very rare Sun’s Rays
Penumbra
Umbra
Sun’s Rays
Only total eclipse if in the umbra.
Very rare

50. Lunar Eclipse Can only occur during the full moon phase.
Umbra
Penumbra
Every one on the night side sees the eclipse.
Can only occur during the full moon phase.

52. Solar Eclipse 2017

55. Jan 20-21
Lunar Eclipse 2019

56. Are We Alone?

57. Home Sweet Home
You are here!