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Four stars full of burnt nuclear ash are speeding through the galaxy

https://www.newscientist.com/article/2194683-four-stars-full-of-burnt-nuclear-ash-are-speeding-through-the-galaxy/

Type Ia supernova start when a white dwarf steals from its partner

Type Ia supernova start when a white dwarf steals from its partner

Russell Kightley

They’re the stars that refuse to die. Astronomers have detected four stars hurtling through the galaxy that are full of ashes, likely because they are survivors of enormous cosmic explosions. Two of them look set to escape the Milky Way altogether.

The first of these cosmic runaways, called LP 40-365, was discovered in 2017. Roberto Raddi at Friedrich Alexander University Erlangen-Nürnberg in Germany and his colleagues have used data from the Gaia space observatory and the Sloan Digital Sky Survey to …

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