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Chapter 2. Eclipses and Motion of the Moon. a stro1010-lee.com. Survey of Astronomy. twlee2016@gmail.com. Chapter 2. Sidereal Day and Synodic Day. a stro1010-lee.com. Survey of Astronomy. twlee2016@gmail.com. Chapter 2. Lunar Phases. a stro1010-lee.com. Survey of Astronomy.

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Presentation Transcript
slide1

Chapter 2

Eclipses and Motion of the Moon

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide2

Chapter 2

Sidereal Day and Synodic Day

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide3

Chapter 2

Lunar Phases

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide4

Chapter 2

Solar Eclipse

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide5

Chapter 2

Lunar Eclipse

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide6

Chapter 2

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,

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide7

Chapter 2

Lunar Eclipse

During passage through the Earth’s shadow the Moon can encounter partial shadow, complete shadow or both during its transit

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide8

Chapter 2

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.

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide9

Chapter 2

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

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide10

Chapter 2

The Old Greeks

  • Aristotle
    • Phases of the Moon
  • Hipparchus
    • Star Charts
    • System of Stellar Magnitude
    • Precession
  • Aristarcus
    • Sizes
  • Erotosthenes
    • Circumference of the Earth

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com

slide11

Chapter 2

Go to Chapter 3

astro1010-lee.com

Survey of Astronomy

twlee2016@gmail.com