11.12.2010

Astronomy Animations

Coordinate Systems:Latitude and Longitude
The origin and use of Latitude and Longitude
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Coordinate Systems: The Horizon System
The origin and use of the Horizon System
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Coordinate Systems: The Equatorial System
The origin and use of the Equatorial System
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The Celestial Sphere
The Celestial Sphere
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Earth's Orbital Motion and the Sun's Motion Across the Celestial Sphere
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The Diurnal Motion of the Stars Created by the Rotation of the Earth
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A Simple Demonstration of Parallax
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Stellar Parallax and the Celestial Sphere: Changing Appearance of Constellations From Earth's Motion
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Exaggerated Stellar Parallax: the Apparent Motion of Stars due to Earth's Orbital Motion
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Meridian and Motion of the Sun
Using a Gnomon's Shadow to track the motion of the Sun
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Seasonal Variation of a Gnomon's Shadow
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Eclipses
Why Solar Eclipses Happen
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Why Solar Eclipses Don't Happen Every Month
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Why Solar Eclipses Happen (redone)
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Why Solar Eclipses Don't Happen Every Month (redone)
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The geometry of solar and lunar eclipses
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Orbital Motion
The Earth and Moon Orbit Each Other as they Orbit the Sun (not to scale!)
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The Moon's Path around the Sun (object size exaggerated)
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Seasons
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Orbital Elements: Describing an Orbit About the Sun in 3D
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Tidal Forces
Tidal Effects on a Planet and Satellite
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Spring and Neap Tides on the Earth
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Retrograde Motion of the Planets
Ptolemy's Model for a Superior Planet
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Ptolemy's Model for an Inferior Planet
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Copernicus's Model for a Superior Planet
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Copernicus's Model for an Inferior Planet
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The Phases of Venus
Copernicus's Model and the Phases of Venus
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Ptolemy's Model and the Phases of Venus
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Kepler's Laws
Kepler's First Law
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Kepler's Second Law
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Rotation Curves
Rotation Curve for Our Solar System
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Rotation Curve for a Galaxy and the Wind Up Dilemma
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Density Waves and the Stability of Galactic Spiral Arms (Artist Conception)
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Hypothetical Rotation Curve for a ""Uniform Ball"" of Stars
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Planets and Satellites
A Perspective of Earth's Moon
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Relative Size of the Planets
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A Cloudless Perspective of Venus Based Upon Radar Data
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A Perspective of Mars
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3-D map of Asteroids (astorb.dat from Bowell@Lowell)
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Ringworld Fly-By: Hypothetical Construct of an Arbitrarily Advanced Civilization (large)
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Exotic Stars and Black Holes
Pulsar: A Spinning Neutron Star with Beamed Radio Emission
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Pulsar: A Spinning Neutron Star with Beamed Radio Emission (revised)
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Pulsar: A Spinning Neutron Star with Beamed Radio Emission (revised and extended)
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Eclipsing Binary
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Eclipsing Binary II
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Spectroscopic Binary
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Anatomy of an Active Galactic Nucleus
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Twisted Magnetic Fields Driving Galactic Jets
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Mass Transfer in a close Binary Star System
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Compact Stars and Gravitational Wells
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Equivalence Principle
Equivalence Principle: Accelerating in Space vs. Remaining Stationary in Gravity
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Equivalence Principle: Stationary in Space vs. Freefall in Gravity
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Expansion of the Universe
Expansion of the Universe and Red Shift of Cosmic Background Radiation
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Expansion of the Universe and Wavelength Red Shift
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Hubble's Law: Red Shift/Distance and Cosmological Expansion
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Sending Signals Across Vast Distances and the Expansion of the Universe
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Curvature of Space
Geodesics and Positive Curvature
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Geodesics and Negative Curvature
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Geodesics and Zero Curvature
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Gravitational Lensing of Light
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Frame Dragging and the Lense-Thirring effect
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Gravitational Waves
Linear Polarized Gravitational Wave
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Elliptically Polarized Gravitational Wave
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Disk Formation
Disk Formation in Collapsing Cloud
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