To suggest topics or sites for Web Watch, please visit http://www.physicstoday.org/suggestwebwatch.html. Compiled and edited by Charles Day

Tycho Sleator of New York University teaches a course called 20th Century Concepts in Space, Time, and Matter. To help convey time dilation, quantum superposition, and other concepts, he’s put together a set of Quicktime Animation Studies.

If you’ve lost count of the number of extrasolar planets discovered so far, or if you want to know more about the planets’ properties and how the planets are found, visit California and Carnegie Extrasolar Planet Search.

Britain’s venerable Royal Society is following the example of its US counterpart, the National Academy of Sciences, in making its online archive of journals freely available. Among the papers you can download from The Royal Society Digital Journal Archive is James Clerk Maxwell’s “A Dynamical Theory of the Electromagnetic Field,” which appeared in Philosophical Transactions of the Royal...

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