The Astronomy Center has provided educational resources to introductory astronomy educators since 2003. Over the past 20 years, the rapid pace of discovery has rendered some of our linked resources obsolete. Thus, the Astronomy Center will be decommissioned on March 1, 2022. Our highest quality resources will be retained on ComPADRE.org.

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Results #1-#10 of 53
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Sidereal and Solar Day  [ Computer Program ]
  
Match Score:
100
Byline:
M. Belloni and T. Timberlake
Post a comment | Relations
The Sidereal and Solar Day model illustrates the difference between the sidereal and solar day. The planets of our solar system both orbit around Sun and rotate on their axis. These…
Kepler System Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The Kepler System model simulates Kepler's final theory of planetary motion. In this theory the planets orbit in ellipses with Sun at one focus (Kepler's First law). These elliptical…
Eratosthenes Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
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The Eratosthenes model displays the shadows cast by two gnomons (sticks) at different locations on Earth. For one gnomon, Sun is directly overhead (as would be the case if the gnomon…
Equatorial Coordinates Model  [ Computer Program ]
  
Match Score:
100
Byline:
M. Belloni and T. Timberlake
Post a comment | Relations
The Equatorial Coordinates model displays the position of a star in equatorial (Right Ascension/Declination --- RA/Dec) coordinates. The horizon is shown along with the four cardinal…
Solar and Lunar Eclipse Model  [ Computer Program ]
  
Match Score:
100
Byline:
M. Belloni and T. Timberlake
Post a comment | Relations | Standards
The Solar and Lunar Eclipse model simulates the occurrences of solar and lunar eclipses. Moon's orbital inclination of 5.145 degrees with respect to the ecliptic (the Earth-Sun…
Earth Orbit Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The EJS Earth Orbit model illustrates the Copernican theory of Earth's orbit around the sun. The top window shows a view from outside the celestial sphere. The simulation shows the…
Equinox Precession Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The EJS Equinox Precession model illustrates the Copernican theory of Earth's orbit around the sun. The top window shows a view from outside the celestial sphere. The simulation…
Copernican System Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The Ejs Copernican System model illustrates Copernicus' system of planetary motions. The entire system is centered on the center of Earth's uniform, circular orbit. Sun is placed…
Superior Ptolemaic Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The Ejs Superior Ptolemaic model illustrates Ptolemy's orbit for a superior planet. The model consists of a deferent circle, centered on a point some distance from Earth (at the…
Inferior Ptolemaic Model  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
Post a comment | Relations
The Ejs Inferior Ptolemaic model illustrates Ptolemy's orbit for a inferior planet. The model consists of a deferent circle, centered on a point some distance from Earth (at the…
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Results #1-#10 of 53