Cornell University
Cornell University: Astronomy: Orbital Motion and Kepler's Laws
At this site from the Astronomy Department of Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each, along with links to additional information on related subjects.
University of Maryland
University of Maryland: The Astronomy Workshop
Find tools to calculate astronomical distances and sizes, to view various Solar System models, to compare gravity's affect on weight, and more. A good place to find interesting facts, simple animations, and astronomy links to physics and...
Other
National Optical Astronomy Observatory: A Planetary Nebula Sampler
A planetary nebula forms when a star can no longer support itself by fusion reactions in its center. This NOAO site is also illustrated.
Ducksters
Ducksters: Astronomy for Kids: Astronauts
Kids learn about the astronauts who travel and explore outer space including spacesuits, fun facts, and famous adventurers like Buzz Aldrin, Yuri Gagarin, and Sally Ride.
Ducksters
Ducksters: Astronomy for Kids: Stars
Kid's learn about the science of stars like our Sun. Giant hot balls of gas and energy made mostly of hydrogen and helium.
University of Massachusetts
U Mass Astronomy: Five College Radio Astronomy Observatory
Resource provides basic information about the telescope and research projects being done there.
Other
Radio Sky Publishing: Site for Amateur Radio Astronomy
Site describes multiple resources for the beginner amateur radio astronomer. Great general information for beginners on basic radio physics and on the fundamentals of radio telescopes. Nice set of links to other useful sites.
University of St. Andrews (UK)
University of St. Andrews: Physics and Astronomy: Electric Potential and Charge
From The Scots Guide to Electronics web site. The meaning of electric potential is described. A combination of diagrams and words are used to explain this difficult concept without the use of mathematics. Very well done!
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, learners 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.
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