1. Eclipses
Page 564

2. The Next Lunar Eclipse will be February 11th
Note the Duration of Time on the video. Approx. 4 hours for a lunar eclipse to occur

3. POM Chart (in your note book)
PHENOMENON:
What did you observe?
What evidence do you have?
OBJECTS:
Define the system.
What objects are interacting?
MOTION:
Describe the motion that in the model that explains your observations

4. Model it
Use the Sun, Earth, Moon model to demonstrate how the moon can “disappear” from view and return to view later.

5. Umbra: Central point (focus) of the sun’s shadow
270 km (170 miles) wide shadow
Shadow moves across the earth at 1700 km/hr
Area of TOTALITY lasts only 7.5 min.

6. Penumbra: Wider part of the sun’s shadow Area of partial eclipse
Earth, moon are not along the same orbital plain

7. Lunar Eclipse Occurs at Full Moon
Sun and moon are in OPPOSITE directions from earth
The moon moves into the earth’s shadow,
blocking the Sun from shining on the
moon and it darkens.
Visible to all on night side of earth
Last 2-3 hours

8. Pg. 604

9. Lunar eclipse
The curved edge of the Earth’s shadow begins to cut across the face of the moon
Until the entire moon’s face is covered
The moon takes on a red glow due to refraction (bending) of the long red wavelengths of sunlight around the Earth
The other shorter wavelengths of color
are scattered as they go through
the Earth’s atmosphere.

10. Model it
Watch the SOLAR eclipse in Australia
Using the sun, Earth Moon model, show how the Sun can completely disappear from view

11. Solar Eclipse
Occurs when sun and moon are in the same direction from Earth
Moon passes directly in front of the Sun
Occurs during the day, with a new moon
Turns day into night – sunlight is reduced to almost nothing!
Lasts a few minutes
Only a small area can see the total eclipse

13. Corona: as the moon covers the body of the sun, the sun’s atmosphere is seen as a glowing
‘crown’

15. Prime viewing locations are:
Carbondale (last 2m38s at 1:20pm)
August 21st. 2017

16. Lunar or Solar eclipse??
Is the moon causing a shadow or in a shadow?

17. Bell work: Lunar or Solar ecllipses
Which occurs more often?
Which last the longest time?
Which can be seen during a NEW moon?
Which one should you NOT look directly at?
Which eclipse will half the world be able to see?

18. The moon orbits the Earth every 28 days
So is there an eclipse every month?
Look at some Data on eclipses
Look at a Model:

19. The moon orbits in a different plane than the Earth does
The moon orbits in a different plane than the Earth does. About 5° difference The moon’s orbit around the Earth is elliptical