Submitted by György Chityil ... on Fri, 01/19/2018 - 23:22 Hierarchy: NounDescription: {{astronomy}} Astronomy using infrared, visible{{,}} and/or ultraviolet wavelengths.Ngram: optical astronomyNgram Text: optical astronomySource: WiktionaryIssue: 0Wiktionary tag: astronomyNgram Count: 2