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Scientists explain how Butterfly Nebula got its wings
Updated : 3 years, 2 months ago IST
Planetary nebulae form when red giant stars expel their outermost layers as they run out of helium fuel, becoming hot, dense white dwarf stars that are roughly the size of Earth. The material that was shed, enriched in carbon, forms dazzling patterns as it is blown gently into the interstell
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