{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Randal Jackson", "hasEmail": "mailto:randal.k.jackson@jpl.nasa.gov"}, "description": "This interactive multimedia timeline traces the search for extrasolar planets, from ancient philosophical speculation to modern discoveries.", "identifier": "NASA-902", "issued": "2009-10-20", "keyword": ["astronomy", "discovery", "extrasolar", "historic", "jpl", "planet-quest", "planetquest", "timeline"], "modified": "2025-07-17", "programCode": ["026:014"], "publisher": {"@type": "org:Organization", "name": "National Aeronautics and Space Administration"}, "theme": ["Space Science"], "title": "PlanetQuest Historic Timeline"}