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AH Scorpii

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description AH Scorpii Overview

AH Scorpii is a cool red supergiant in the constellation Scorpius and a variable star whose apparent brightness changes over time. Its extended atmosphere and low surface temperature give it a deep red color, while observations of its variability and surrounding material help astronomers examine the late stages of massive-star evolution. It is studied as an example of the unstable, high mass-loss phase of massive-star evolution that can precede a supernova.

help AH Scorpii FAQ

What type of star is AH Scorpii?

AH Scorpii is a massive red supergiant and a pulsating variable star. It lies in the constellation Scorpius and is often listed among the largest known stars.

Why does AH Scorpii change in brightness?

AH Scorpii pulsates, meaning its outer layers expand and contract over time. Those changes alter its temperature, radius, and apparent brightness.

Why are estimates of AH Scorpii's size uncertain?

Red supergiants have extended, changing atmospheres that make their physical edges difficult to define. Distance estimates and the wavelength used for observation can therefore affect the reported size.

Could AH Scorpii eventually become a supernova?

As a massive red supergiant, AH Scorpii belongs to the class of stars expected to end in a core-collapse event. Astronomers cannot predict a specific date for such an event, and it is not an immediate forecast.

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