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Published online 9 January 2004 | Nature | doi:10.1038/news040105-12

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Star twins

The first double-team of pulsars may reveal secrets of gravity.

Mark Peplow

Astronomers have realized that a rare set of double stars is made up of two pulsars1. This unique discovery will allow them to test Einstein's theory of relativity in novel ways, and to better understand the energy beams that pulsars generate.

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