Astro 10-Lecture 3:Seasons, Phases of the Moon and Eclipses
The Celestial Sphere
Another line on the celestial sphere
The Earthís pole is tilted with respect to the ecliptic
The sun appears to travels along the ecliptic over the course of the year
The orbits of the other planets are also in the ecliptic plane
Models of Possible Causes
Choosing a Model
Preferring a Model
Ruling out a Model
The orbit of the Earth
Ruling out another Model
The size of the Earth
The Moon: The Earthís Companion
Phases of the Moon
Why do we see phases?
Moon rotates to keep same face toward the Earth
Eclipses: Solar (Partial)
Eclipses: Solar (Total)
Eclipses: Solar (Annular)
Eclipses can only happen at certain phases of the moon.
Then why donít we have eclipses every month?
Email: korpela at ssl.berkeley.edu
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