When the sun dies in about 10 billion years, researchers predict it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula. 90% of stars become planetary nebulae during their afterlife, but some astronomers question if the sun had sufficient mass to do so.

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When the sun dies in about 10 billion years, researchers predict it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula. 90% of stars become planetary nebulae during their afterlife, but some astronomers question if the sun had sufficient mass to do so.