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| Determining Planet Properties
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Atmospheres
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Energy Transport
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Appearance and Colors of the Atmospheres
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Magnetic Fields
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Planet Interiors
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Mars
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Earth
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Moons and Rings
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Jupiter's Large Moons
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Titan
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Rings
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Celestial Sphere Defined
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Angles
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Reference Markers
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Motion of Our Star the Sun
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Coordinates
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Time and Seasons
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Time Zones
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Equation of Time
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Seasons
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Review Questions
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Motions of the Moon
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Phases and Eclipses
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Eclipse Details: Lunar Eclipse
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![]() 11Visits - 3.0 Stars - 1 Vote | Introduction | ||
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Newton's Law of Gravity - Introduction
2Visits - 2.0 Stars - 1 Vote | Introduction | ||
Newton's Laws of Motion
2Visits - 2.0 Stars - 1 Vote | Introduction | ||
Universal Law of Gravity
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Mass vs. Weight
2Visits - 2.0 Stars - 1 Vote | Introduction | ||
Inverse Square Law
2Visits - 2.0 Stars - 1 Vote | Introduction | ||
Gravitational Acceleration
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
A Closer Look at Newton's Gravity
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Orbits
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Kepler's Third Law
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Tides
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Introduction
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Other Galaxies
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Types of Galaxies
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Spirals
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Irregulars
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Distances to Galaxies
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Masses of Galaxies
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Clusters of Galaxies
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Galaxy Origins
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Active Galaxies
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Active Galaxies
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Power Source for Active Galaxies and Quasars
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
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Introduction
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Observations and Some Implications
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Universe is Uniform on Large Scales
1Visits - 2.5 Stars - 2 Vote | Introduction | ||
Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Cosmic Microwave Background Radiation
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Matter to Energy to Matter Conversion
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Evidence Supporting the General Big Bang Scheme
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Fate of the Universe
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Is The Universe Open or Closed?
1Visits - 2.5 Stars - 2 Vote | Introduction | ||
Fate of the Universe
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Embellishments on the Big Bang
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Planetary Science - Introduction
0Visits - 0.0 Stars - 1 Vote | Introduction | ||
Solar System Fluff - Introduction
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Asteroids
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Meteorites
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Radioactive Dating
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Effects of Asteroid Impact on Earth
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Comets
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Comet Orbits---Oort Cloud and Kuiper Belt
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Comet Beginnings and Ends
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Solar System Formation
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
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Einstein's Relativity - Introduction
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Astronomy Without a Telescope - Introduction
106Visits - 0.0 Stars - 1 Vote | Introduction | ||
Astronomy - Introductory Comments
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - A Sense of Scale
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Time.
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Review Questions
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Science in General
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - A Definition of Scientific Truth
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Value of Astronomy in the Scientific Endeavor
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Astrology
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - The Horoscope
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Testing Astrology
1Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Further Testing of Astrology
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
Astronomy - Review Questions
0Visits - 2.0 Stars - 1 Vote | Introduction | ||
![]() 0Visits - 3.0 Stars - 1 Vote | Intermediate | ||
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