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    star evolution tagged posts

    Old Stars Live Longer than we thought

    February 25, 2019, Categories  Astronomy/Space, Biology/Biotechnology

    Thanks to new observations from the ALMA telescope in Chile, it became clear that the stellar wind of this red giant forms a spiral. This is an indirect indication that the star is not alone, but part of a binary star.
    Credit: ALMA (ESO/NAOJ/NRAO)/L. Decin et al.

    Towards the end of their lives some 95% of stars evolve into red giants which lose their mass via a “stellar wind.” Eventually they end up as planetary nebulae, ionized gas with a central hot star, a white dwarf. Researchers form 14 European scientific institutions, among them the IAC, have detected the existence of a binary interaction which had not been noticed by the scientific community...

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