Spots on the Sun vs spots on extreme horizontal branch stars (artist's impression)

Spots on extreme horizontal branch stars (right) appear to be quite different from the dark sunspots on our own Sun (left), but both are caused by magnetic fields. The spots on these hot, extreme stars are brighter and hotter than the surrounding stellar surface, unlike on the Sun where we see spots as dark stains on the solar surface that are cooler than their surroundings. The spots on extreme horizontal branch stars are also significantly larger than sunspots, covering up to a quarter of the star’s surface. While sunspots vary in size, a typical size is around an Earth-size planet, 3000 smaller than a giant spot on an extreme horizontal branch star.

Herkunftsnachweis:

ESO/L. Calçada, INAF-Padua/S. Zaggia

Über das Bild

ID:eso2009b
Typ:Illustration
Veröffentlichungsdatum:1. Juni 2020 17:00
Dazugehörige Veröffentlichungen:eso2009
Größe:3840 x 2160 px

Über das Objekt

Typ:Unspecified : Galaxy : Grouping : Cluster
Kategorie:Stars

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Siehe auch