Assertion: nebula's star | /r/CapableOf | evolve in planetary nebula
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text: Once it had been thought that, as planetary nebulae occur only late in the life of a star (for stars of an initial mass of 1 solar mass, after about 10 billion years), and these stellar swarms tend to dissolve in times shorter than that needed for a star to evolve in a planetary nebula (typically, less than 1 billion years); low-mass stars of less than about 3 solar masses have considerably more than 1 billion years of lifetime in their hydrogen-burning phase.