‘Make Pluto a planet again’? NASA chief revives debate that divides astronomers

Will Pluto become a planet again?Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute Many of us are old enough to have grown up with nine planets orbiting the Sun. In 2006, however, a controversial decision within the astronomy community resulted in the official list being cut to eight, removing Pluto. On Tuesday, responding to…

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