{"id":"https://openalex.org/keywords/planetary-motion","display_name":"planetary motion","description":"Planetary motion is the movement of planets through space, described and studied in astronomy and gravitational physics.","display_name_alternatives":["motion of planets","planetary motions","movement of planets"],"ids":{"openalex":"https://openalex.org/keywords/planetary-motion","wikidata":null},"primary_topic":{"id":"https://openalex.org/T12836","display_name":"History and Developments in Astronomy","score":0.3041,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12836","display_name":"History and Developments in Astronomy","score":0.3041,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13175","display_name":"Historical Astronomy and Related Studies","score":0.2013,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":10862,"cited_by_count":27635,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/planetary-motion","updated_date":"2026-10-22T04:07:25","created_date":"2026-09-30T00:00:00"}