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Pulsars are compact, rotating stars that emit beams of radio waves in the same way a light house emits its beam. They are also useful as astronomical clocks that can be used to test Einstein's theory of general relativity. Astronomers don't know why pulsars emit these beams. We are using two telescopes (Parkes in New South Wales and the MWA in Western Australia) to simultaneously study the beams at different wavelengths of radio waves. These measurements will be used to develop better models for pulsar emission and to understand how to improve their accuracy as clocks.
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