Pulsar: A pulsar (pulsating star, on the model of quasar) is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles. This radiation can be observed only when a beam of emission is pointing toward Earth (similar to the way a lighthouse can be seen only when the light is pointed in the direction of an observer), and is responsible for the pulsed appearance of emission. Neutron stars are very dense and have short, regular rotational periods
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23K views · 903 reactions | Incredible pulsating aurora last night near Fairbanks, Alaska. This is a real-time video showing just how dramatic the sky was. The flickering patches were easily visible to the eye. | Vincent Ledvina - 'The Aurora Guy' | Facebook
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140K views · 34 reactions | On top of Mauna Kea, the tallest volcano on the planet, there lie 13 telescopes from 11 different counties, making it the premiere astronomical observing site in the northern hemisphere. On episode 1 of STELLAR, Matt O'Dowd from PBS SpaceTime visits the Gemini Telescope on Mauna Kea to learn about an amazing wonder discovered there in Spring 2017. | PBS Digital Studios | Facebook
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