Astronomers Discover Close Pair of White Dwarfs in Center of Planetary Nebula Henize 2-428

At the heart of the unusual planetary nebula Henize 2-428, a group of astronomers led by Dr Miguel Santander-Garcia from the Observatorio Astronomico Nacional and the Instituto de Ciencia de Materiales de Madrid has discovered two massive white dwarf stars that are expected to merge and trigger a Type Ia supernova in approximately 700 million [...] —> Read More Here


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