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Astronomy
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Demonstrations 141  160 of 188
Bending of Light by a Star
Brightness and Magnitude
Colliding Galaxies
Choreographic Motions of N Bodies
Motion of a Planet around a Star
Orbits around Schwarzschild Black Holes
The Solar Wind
Conic Sections: The Double Cone
Astronomical Units of Length
The Celestial TwoBody Problem
Variation of the Equation of Time with the Precession of the Equinoxes
Cassegrain Telescope
Newtonian Reflecting Telescope
Time and Weight in the Solar System's Planets
Contact Binary Star Envelopes
View of Our Solar System
Absorption Spectroscopy
The Celestial Sphere
Newton's Ellipse
Think Big, Really Big!
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