Final Topics in Space Science

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Final Topics in Space Science

• SCI 2201
• Solar and Lunar Eclipse
• Reason for the Seasons

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Meteor Showers

• On most moonless nights, youll see 4 or 5
  meteors per hour.
• Major annual meteor showers are named after
  constellations
• Perseids Jul 17-Aug24
• Leonids Nov 14-21

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Comets
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Comets icy visitors from beyond the solar
system

• Dirty snowballs
• Some are captured in a
• regular orbit about the Sun
• Haleys, Hale Bop
• Kuiper belts
• Just beyond Pluto
• Oort cloud
• 1000X beyond Pluto

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Moon Patterns

• Moon moves east to the East with respect to the
  Sun by about one diameter per hour
• Counterclockwise if viewed from above
• Moon completes phase cycle in 29.5 days
• Time of moon rise grows later each day
• The Moon rotates and revolves in the same length
  of time, 27.3 days.

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Phases of the Moon link
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Eclipse

• When either the Sun or the Moon crosses into the
  shadow cast by the other, an eclipse occurs.

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• Umbra Inner core of total darkness
• Penumbra Outer, partial shadow

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Lunar Eclipse

• Moon passes through the shadow of the Earth.

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Types of Lunar Eclipses
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Solar Eclipse

• Earth passes through the shadow of the Moon.

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Types of Solar Eclipses
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Bailys Beads
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Diamond Ring
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Solar Corona
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Solar Prominences
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Reason for the Seasons
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Prime MeridianGreenwich, England
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Celestial Sphere
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Angular Measurement
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Final Topics in Space Science

• SCI 2201
• Solar and Lunar Eclipse
• Reason for the Seasons
• UT Astronomy Course Great link!!!
• Fred Espenak's Eclipse Home Page