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Catalogs of Nebulae
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Which catalog of nebulae was compiled by John Herschel in the 19th century?
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A
Herschel 400 Catalog
💡 Explanation:
The Herschel 400 Catalog is a catalog of 400 nebulae compiled by John Herschel in the 19th century. It is one of the earliest catalogs of nebulae and is still used by astronomers today.