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NASA's Hubble Space Telescope has peered into the inner core of the nearby so-called "symbiotic star," R Aquarii, to reveal dramatic new details of the exploding star. The observations were made with the European Space Agency's Faint Object Camera. One of the closest stars known to undergo violent eruptions that spew out huge quantities of processed nuclear material into the surrounding space, R Aquarii was studied by none other than Edwin Hubble in an effort to understand the mechanism that powers the cataclysm. The instrumentation then available allowed him and his colleagues to conjecture ...