Cornell University
Cornell University: Astronomy: Aristarchus
This site from Cornell University provides a discussion of how Aristarchus arrived at his conclusions of the distance from the Earth to the Sun and Moon. Also has his methods for determining the size of the Moon and the Sun.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Astronomy: Sidereal Solar Day
A computer based simulation demonstrating the difference between a sidereal day and a solar day.
Other
Bad Astronomy/phil Plait: Tides and Why Our Days Are Getting Longer
Why does the Moon always shows the same face to the Earth? Why is the Moon's rotation period the same as the length of time it takes to orbit the Earth? Why are there two tides a day? These questions and more are answered here.
Other
National Optical Astronomy Observatory: Jewels of the Night
Using the Jewelbox Cluster, students determine the cluster's age based on measurements of its color and brightness.
NASA
Nasa: Astronomy Picture of the Day: Jupiter
A triple eclipse crossing the face of Jupiter on 2 Feb 98. This set of five images captures the passage of the shadows of Io, Callisto, and Ganymede across the face of Jupiter.
NASA
Nasa: Astronomy Picture of the Day: Jupiter's Clouds 3 D
Every day is a cloudy day on Jupiter, the Solar System's reigning gas giant. This 3-dimensional visualization presents a simplified model view from between Jovian cloud decks based on imaging and spectral data recorded by the Galileo...
NASA
Nasa: Astronomy Picture of the Day: Jupiter's Great Red Spot
This collage of images by the Hubble Space Telescope captured the changes in Jupiter's Great Red Spot over a period of several years.
NASA
Nasa: Astronomy Picture of the Day: Lunar Dust and Duct Tape
Dust, a common and usually minor problem on Earth, presented a major challenge for the Apollo astronauts on the Moon. Here's an interesting solution created by the Apollo 17 crew.
Other
Geo 154 Astronomy : Retrograde Motion
A detailed explanation of retrograde motion with three different explanations and movies to accompany them. Additional links are available for more research.
NASA
Nasa: Imagine the Universe: Welcome to the World of X Ray Astronomy
Site recounts how X-rays were discovered as well as who discovered them. Offers graphics, links to facts on this topic, a quiz, and teacher resources.
NASA
Nasa: Basics of Radio Astronomy
Site developed by NASA to support training at the Goldstone-Apple Valley Radio Telescope. A manual in PDF format that covers everything from the basics of electromagnetic spectrum through radio sources through mapping the sky in the...
Other
South African Astronomical Observatory
The South African Astronomical Observatory (SAAO) is the national facility for astronomy in South Africa. Homepage contains information on the telescopes it operates, including the South African Large Telescope project. Contains links...
Enchanted Learning
Enchanted Learning: The Planets
This survey of the planets includes all the basics, size, mass, atmosphere, length of day, and the like. It features interactive activities and learning exercises and compares all of the planets in colorful tables.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Local Coordinates Model
This astronomy simulation presents stars in their Altitude/Azimuth coordinates serving as an introduction to the celestial globe and equatorial coordinates.
Other
Virginia Space Flight Academy: Summer Residence Camps
Watch campers count down for take-off and the ultimate rocket launch during this summer space camp experience. Read about programs offered including spaceships, aerodynamics, microgravity, robotics, rocket assembly and launching,...
Other
Fisher Science Education: Headline Discoveries Archive
What's new in the world of science? Find the latest articles about the newest discoveries and research in all the science disciplines: anatomy, astronomy, biology, biotechnology, chemistry, consumer science, environmental, forensics,...
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