Friday, 13 June 2014 11:38
E2-33: RETROGRADE MOTION
Additional Info
- ID Code: E2-33
- Purpose: Demonstrate the observation of another planet as seen from the earth.
- Description: Turning the crank on the back of the apparatus rotates the two planets around the sun, with the inner planet rotating at about four times the angular speed of the outer planet. The side of each planet opposite the sun is painted black to simulate a shadow. The rod between the two planets aids in fixing the observational line of sight.
- Availability: Available
- References: REFERENCES: (PIRA 8A10.55)
- Loc codes: E2
Published in
E2 Astronomy
Tagged under
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E2-01: WORLD GLOBE
Illustrate the globe Read More
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E2-02: MEASUREMENT OF RADIUS OF EARTH
Demonstrate how the radius of the earth can be measured using trigonometry.
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E2-03: CRATER FORMATION MODEL
Illustrate how a crater forms as a result of an impact or a blast from below.
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E2-11: SOLAR PLASMA MODEL
Mass driver and ring heater show coronal holes and coronal heating.
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E2-12: FUSION MODEL
Demonstrate how nuclei attract each other if they come close enough together.
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E2-13: SUNSPOT MODEL
Show how sunspots are darker than their surroundings due to lower temperatures.
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E2-21: PHASES OF THE MOON
Show the relationship between the phases of the moon and the relative earth-sun-moon positions. Read More
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E2-22 UMBRA AND PENUMBRA
Illustrates shadow umbra and penumbra Read More
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E2-23: UMBRA AND PENUMBRA - EXTENDED SOURCE
Show umbra and penumbra with an extended source, as in an eclipse.
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E2-24: UMBRA AND PENUMBRA - COLOR FILTERS
Identify the source of penumbra regions.
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E2-31: SOLAR SYSTEM MODEL
Illustrate the approximate angular disposition of the planets around the sun.
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E2-32: EPICYCLE MODEL - PTOLEMAIC SYSTEM OF PLANETS
Illustrate the epicycle nature of Ptolemy's model of the solar system
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E2-33: RETROGRADE MOTION
Demonstrate the observation of another planet as seen from the earth.
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E2-34: BASIC ORRERY (PLANETARIUM)
Demonstrate the sun-earth-moon spatial relationship and related concepts..
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E2-35: PLANETS - RELATIVE SIZES MODEL
Illustrate the relative sizes of the planets Read More
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E2-36: DENSITY STRATIFICATION - FORMATION OF PLANETS
Demonstrates how density stratification (differentiation) in interior of planets occurs.
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E2-37: PLATONIC SOLIDS AND KEPLER
Visualize the Platonic solids and Kepler's dream for using them to explain planetary orbits.
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E2-41: TRANSPARENT CELESTIAL GLOBE
Illustrate some relationships between the earth, the sun, and certain heavenly bodies
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E2-42: TELESCOPE MODEL
Show how a telescope can view any point in the sky using a universal mount.
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E2-43: ROTATING STAR FIELD
Show the apparent motion of the night sky.
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E2-44: BINARY STAR MODEL
Illustrate the orbital motion of a binary star system.
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E2-45: ECLIPSING BINARY STAR MODEL - LIGHTS
Show how we view a rotating binary star.
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E2-46: ECLIPSING BINARY STAR MODEL - SPHERES
Illustrate the orbits of stars in an eclipsing binary.
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E2-47: TWINKLING STAR
Show how air currents cause the "twinkling" of a star.
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E2-48: NON-TWINKLING PLANET
Illustrate why a planet does not "twinkle" like a star.
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E2-49: PULSAR MODEL - RADIOWAVES
Show the changing field pattern from a rotating dipole.
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E2-50: PULSAR MODEL - FLASHLIGHTS
Illustrate beaming pattern of pulsars and pulsed binary X-ray sources.
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E2-51: GRAVITATIONAL COLLAPSE - MODEL
Model gravitational collapse.
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E2-53: STELLAR EVOLUTION - HYDROGEN BURNING
Provides models for hydrogen burning to produce helium in stars via the proton-proton chain.
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E2-54: REFLECTING TELESCOPE - STRING MODEL
Shows how rays are focused by a standard reflecting telescope. Read More
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E2-61: GALAXY MODEL
Illustrate our galaxy.
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E2-62: SPIRAL GALAXY - WATER MODEL
Show that "permanent" spiral structure can exist as a wave which moves independently from the fluid
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E2-63: EXPANDING UNIVERSE
Demonstrate the concept of the expansion of the universe.
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E2-71: MILLISECOND PULSAR
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E2-72: AUDIOTAPE 14 MIN - NRAO PULSAR
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E2-73: AUDIOTAPE 18 MIN - SOUNDS FROM SPACE
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