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Supersonic cosmic winds blew up giant galactic bubbles

发布时间:2017-06-17 05:01:32来源:未知点击:

SUPERSONIC winds stopped in their tracks – that’s what dunnit. This is the latest explanation for the giant bubbles that stick out above and below our galaxy. In 2010, NASA’s FERMI gamma-ray telescope unveiled a stunning image of two bubbles – each 25,000 light years high – that emerge from the centre of the Milky Way, on either side of the galactic plane. One suggestion is that cosmic winds, made of gases and particles produced during intense episodes of star formation, blow out these Fermi bubbles, but the exact mechanism is unclear. Now,