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The Celestial Sphere. Celestial Equator Ecliptic Two intersecting planes -- the 4 cardinal pts – equinoxes and solstices. The sky from 3 different position on Earth. Origin of the seasons -- tilt of the Earth’s axis. Precession. Phases of the Moon. Eclipses of the Sun and Moon. - PowerPoint PPT Presentation
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The Celestial Sphere
Celestial Equator
Ecliptic
Two intersecting planes -- the 4 cardinal pts – equinoxes and solstices
Eclipses of the Sun and Moon
Solar – new moon
Lunar – full moon
Moon must be at one of the nodes of its orbit and the line nodes points to the Sun
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