Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter @sciencef1rst.
Extreme stars and puzzling pulsars
As a result, the balancing act that has defined the star's existence for billions of years ends — with gravity being the victor. The material that comprises this dead star is so utterly compressed by this collapse that it is considered the densest known matter in the universe. A mere sugar cube-sized chunk of neutron star matter, for instance, would weigh as much as 1 billion tons. That's about 1,000 times the weight of the Golden Gate Bridge.
Additionally, the collapse of stellar cores can push together stars' magnetic field lines, causing them to vastly increase in strength and creating some of the most powerful magnetic fields in the known universe. Over the last ten years, astronomers have witnessed the pulsar pulling material from its companion star. This stolen material forms a structure called an accretion disk around the pulsar itself, from where the clumps are gradually siphoned to its surface.
France Dernières Nouvelles, France Actualités
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