Scientists Map the Structure of a Pulsar's Beam

Finally, scientists have their finger on the pulse. 

Spinning dead stars, known as pulsars, blast powerful beams of radio waves into space. As a pulsar spins, its beams sweep past Earth, producing a pulsating signal similar to a lighthouse's flashes. Astronomers now have mapped the structure of the beams of one pulsar, using observations made over decades.

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