Hop aboard the train of thought. A remote learning resource has learners consider thought experiments to consider scientific theories. It provides two examples, one on orbiting bodies and the other on the speed of light, for them to work...

Let Einstein's work shine the way. Pupils read about Einstein's iconic equation, E=mc^2, using a remote learning resource and see how ideas from other scientists such as Kepner, Curie, Galilei, and Newton led to its discovery. They...

Just how big is the galaxy? Learners read information about the size of the Milky Way galaxy to better comprehend its size. Pupils develop an understanding of the number of stars in the galaxy by finding just how big a billion is and...

Using a question and answer format, this page discusses the question: "Is the Speed of Light Constant?" Discusses some of the history and experiments performed with light and the conclusions drawn from those findings.

This page is a continuation of a tutorial about light reflection and refraction. It contains a diagram and suggestions on how to derive Snell's Law, which governs the refraction of light in a medium. For background to this derivation,...

This site from Stanford University is on the topic of simultaneity in relativity.

Resource focuses on the relationship between the frequency, wavelength and speed of light. Has a link to an interactive activity relating frequency, wavelength, and energy.

A physics usenet listing of frequently asked questions relating to relativity, answered by a number of scientists. Administrivia and Reference, Speed of Light, Special Relativity, General Relativity and Cosmology, Black Holes. Loads of...

A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.

Kids learn about the speed of light and time dilation in regards to the theory of relativity in the science of physics. Also how gravity can change the passage of time.

Discover what neutron stars and pulsars are and view pictures of them. Includes links to additional resources and lesson plans.

Kids learn about the science of light. Energy made of waves and particles called photons traveling at the top speed in the universe. What is refraction? The difference between transparent, translucent, and opaque.

Site provides the article, "NASA Detects One Of Closest And Brightest Gamma Ray Bursts." Provides links to learn more about gamma rays and black holes as well as other resources.

Click "Relativity Q & A". Over 200 questions and answers dealing with relativity (special and general), answered by NASA scientist Dr. Sten Odenwald. Answers are generally one paragraph, very clear and coherent.

Factsheet and chronology of Ole Christensen Roemer, who first measured the speed of light.

This is a definition and example of how distance is measured in astronomy, such as the distance between our earth and the stars.

There are four factors that "Contribute to the vast majority of collisions." This detailed website discusses these: "Equipment Failure," "Roadway Design," "Poor Roadway Maintenance," and "Driver Behavior."

Conversion calculators galore! Convert just about anything from one measureable unit into another measureable unit here with over two dozen calculators. Each of the links is specific to a measureable quantity. Some examples include...

Online access to portions of Einstein's original papers and manuscripts.