Himiko is a Lyman-alpha blob, which is a type of astronomical object characterized by an extended region of hydrogen gas that emits Lyman-alpha radiation. These blobs are typically found at high redshifts, indicating that they are situated at significant distances from Earth and are observed as they were in the early universe. Himiko itself is noteworthy because it is one of the largest and most luminous Lyman-alpha blobs discovered to date.

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