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Early galaxies had magnetic fields as strong as today's

点击量:   时间:2019-03-14 05:19:01

By Anil Ananthaswamy HOW did galaxies get their mysteriously massive magnetic fields? The favoured theory says that galaxies “spin” their own fields over many billions of years. Now a study of light from distant quasars is casting serious doubt on this mechanism. “Young galaxies could not have spun enough times to have built up such large magnetic fields,