Eclipses Page 564

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 https://www.youtube.com/watch?v=j1nVsCcKHwI

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 http://highered.mheducation.com/olcweb/cgi/pluginpop.cgi?it=swf::800::600::/sites/dl/free/007299181x/78778/Eclipses_Nav.swf::Eclipse%20Interactive

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

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.

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

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

Pg. 604

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.

Model it Watch the SOLAR eclipse in Australia https://www.youtube.com/watch?v=2lHb5ruGUyw https://www.youtube.com/watch?v=MWBmKQRQsks Using the sun, Earth Moon model, show how the Sun can completely disappear from view

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

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

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

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

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?

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: http://highered.mheducation.com/olcweb/cgi/pluginpop.cgi?it=swf::800::600::/sites/dl/free/007299181x/78778/Eclipses_Nav.swf::Eclipse%20Interactive

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 http://highered.mheducation.com/olcweb/cgi/pluginpop.cgi?it=swf::800::600::/sites/dl/free/007299181x/78778/Eclipses_Nav.swf::Eclipse%20Interactive