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Punane hiid

Punane hiid Aldebaran võrrelduna Päikesega

Punane hiid on oma arengu lõppfaasi jõudnud täht, mis on oma esialgsest suurusest mitu korda suuremaks paisunud.[1]

Punase hiiu staadiumis tähe pinnatemperatuur on umbes 2473–3473 kelvinit (2200–3200 °C) ja see on oma suuruse tõttu Päikesest märkimisväärselt eredam[2].

Päike muutub punaseks hiiuks umbes viie miljardi aasta pärast ning hävitab Merkuuri, Veenuse ja tõenäoliselt ka Maa.[3]

Punased hiiud on näiteks VY Canis Majoris, Betelgeuse, Arcturus, Antares, Aldebaran, α Herculis, β Pegasi ja Mira.

  1. "What Is A Red Giant Star?". Universe Today. Vaadatud 11. november 2018.
  2. "Red Giant Stars: Facts, Definition & the Future of the Sun". Space.com. Vaadatud 11. november 2018.
  3. "Will Earth Survive When the Sun Becomes a Red Giant?". Universe Today. Vaadatud 11. november 2018.
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Punane hiid
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