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.

Mynd/Myndskeið:

ESO/L. Calçada, INAF-Padua/S. Zaggia

Um myndina

Auðkenni:eso2009b
Tegund:Uppdráttur
Útgáfudagur:Jún 1, 2020, 17:00 CEST
Tengdar fréttatilkynningar:eso2009
Stærð:3840 x 2160 px

Um fyrirbærið

Tegund:Unspecified : Galaxy : Grouping : Cluster
Flokkur:Stars

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