{"id":"https://openalex.org/keywords/galaxy-clusters","display_name":"galaxy clusters","description":"Galaxy clusters are gravitationally bound structures containing many galaxies, along with hot gas and dark matter, studied in astrophysics and cosmology.","display_name_alternatives":["galaxy cluster","cluster of galaxies","clusters of galaxies","galactic cluster","galactic clusters"],"ids":{"openalex":"https://openalex.org/keywords/galaxy-clusters","wikidata":"https://www.wikidata.org/wiki/Q204107"},"primary_topic":{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.7594,"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/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.7594,"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/T10095","display_name":"Cosmology and Gravitation Theories","score":0.1035,"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":51086,"cited_by_count":848819,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/galaxy-clusters","updated_date":"2026-10-20T04:07:40","created_date":"2026-09-30T00:00:00"}