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

On 6 October, NASA’s Messenger spacecraft swooped down over the surface of Mercury for its second flyby. The mission’s Flyby Visualization Tool provides an interactive, visually rich overview of the observations carried out by the spacecraft’s seven scientific instruments.

Andrew Fraknoi of Foothill College edits Women in Astronomy, a collection of online material about the challenges and triumphs of female astronomers past and present. To be featured in the collection, an astronomer has to be the subject of a nontechnical article that’s available online. Fraknoi welcomes suggestions for new entries.

Seventeen organizations in 13 agencies discharge the federal government’s science responsibilities. To search through what those organizations have published, including patents and papers, the Department of Energy has created Science.gov . Now in its fifth year, the portal lets you browse...

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