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The Meridian Plinth
1230pm on Feb. 18, 2008 Suns Angle ?
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The Meridian Plinth
1230pm on Feb. 18, 2008 Suns Angle 41 degrees
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BeginDo Starry Night Demo nightly star changes
(annualstars.snf looking south 2/25/08 at 9pm)
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Movie of Sun through ecliptic (starts 1/1/08)
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The Sun Path ECLIPTIC
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Motion of Mars Movie (fixed on Mars)
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Motion of Mars Movie (Pleiades fixed)
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Path of Retrograde Motion of Mars
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Motion of Venus
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Bounded Elongation

• Mercury and Venus show a different kind of
  motion Bounded Elongation

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Geometry of Bounded Elongation
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Bounded Elongation

• Mercury and Venus show a different kind of
  motion
• Maximum Altitude of Venus 47o

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Bounded Elongation

• Mercury and Venus show a different kind of
  motion
• Maximum Altitude of Venus 47o
• Maximum Altitude of Mercury 28o

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Bounded Elongation

• Mercury and Venus show a different kind of
  motion
• Maximum Altitude of Venus 47o
• Maximum Altitude of Mercury 28o
• All the other planets move across the sky and
  exhibit retrograde motion.

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Summary of Apparent Motions

• Diurnal

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Summary of Apparent Motions

• Diurnal
• Annual

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Summary of Apparent Motions

• Diurnal
• Annual
• Retrogrades

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Starry Night

• Vincent Van Gogh

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Starry Night

• Saint-Remy, France
• 400am, June 19, 1889
• Crescent Moon, Venus, Aries

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Starry Night (Labeled)
Aries
Moon
Venus

• Saint-Remy, France
• 400am, June 19, 1889
• Crescent Moon, Venus, Aries