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Astronomy Chapter 1 Lesson 4: Phases and Eclipses
14
Transcript
What is an eclipse?
Solar Eclipse
(page 25)
Umbra
Those inside see total solar eclipse
Penumbra
Those inside penumbra see partial solar eclipse
Phases
(page 24)
Caused by the different relative positions of the sun, earth, and moon
General things to keep in mind about phases
- Light/shadow passes from right to left
3rd Quarter
- Gibbous is between half and full
Waning Gibbous
Waning Crescent
- Half moons are the quarters
- Waxing means increasing light
- Waning means decreasing light
https://en.wikipedia.org/wiki/Lunar_phase
Full Moon
New moon
Moon cannot be seen in the sky
Waxing Gibbous
Waxing Crescent
First Quarter
https://en.wikipedia.org/wiki/Lunar_phase#Misconceptions
Lunar Eclipse
(page 26)
When Earth casts an umbra on the moon
Motions of the Moon
(page 23)
We will always only see one side of the moon
because the moon rotates and revolves the same speed
Near side
Far side