Which deep-sky object, a magnificent spiral galaxy, can be spotted with the unaided eye under dark skies by following the star chain from Alpheratz?

Answer

Andromeda Galaxy (M31)

Following the star chain starting from Alpheratz guides an observer toward the Andromeda Galaxy (M31), which is visible without optical aid in very dark conditions.

Which deep-sky object, a magnificent spiral galaxy, can be spotted with the unaided eye under dark skies by following the star chain from Alpheratz?
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