Eclipses and Motion of the Moon Chapter 2 Survey of Astronomy astro1010-lee.com.

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Presentation transcript:

Eclipses and Motion of the Moon Chapter 2 Survey of Astronomy astro1010-lee.com

Sidereal Day and Synodic Day Chapter 2 Survey of Astronomy astro1010-lee.com

Lunar Phases Chapter 2 Survey of Astronomy astro1010-lee.com

Solar Eclipse Chapter 2 Survey of Astronomy astro1010-lee.com

Lunar Eclipse Chapter 2 Survey of Astronomy astro1010-lee.com

Lunar Eclipse The reddish light in the Earth’s umbra that allows the moon to be seen even during a Total Eclipse is due to the long visible waves being bent by the Earth’s atmosphere, Chapter 2 Survey of Astronomy astro1010-lee.com

Lunar Eclipse During passage through the Earth’s shadow the Moon can encounter partial shadow, complete shadow or both during its transit Chapter 2 Survey of Astronomy astro1010-lee.com

Because the plane of the Earth’s a orbit and the plane of the Moon’s orbit are not the same, eclipses can occur only when the Sun, Moon and Earth are all on the same line or where the planes cross. Chapter 2 Survey of Astronomy astro1010-lee.com

Aristarcus of Samos (250 bc ) Interested in eclipses Studied everything he could find Recognized the geometry Sun large and a long way away Moon much smaller and nearer Concluded Earth revolves around the Sun Earth rotates on its axis Moon revolves around the Earth Chapter 2 Survey of Astronomy astro1010-lee.com

The Old Greeks Aristotle Phases of the Moon Hipparchus Star Charts System of Stellar Magnitude Precession Aristarcus Sizes Erotosthenes Circumference of the Earth Chapter 2 Survey of Astronomy astro1010-lee.com

Go to Chapter 3 Chapter 2 Survey of Astronomy astro1010-lee.com