This paper emphasizes the scientific and research density of the interconnected circular economy, establishing a robust framework for understanding and promoting the interconnection of related concepts and practices over its timeline. Utilizing content analysis and meta-analysis over the past 17 years, it explores the evolution of the circular economy, offering insights into temporality and future research trends. Employing a systematic literature review (RSL) approach based on a PRISMA research protocol, articles from Scopus and Web of Science (WoS) databases were retrieved. The Science Mapping Analysis Software (SciMAT) and Biblioshiny tools were then used to visualize and assess the development and density of scientific contributions. This study illuminates the potential benefits and challenges of the circular economy, identifies key constructs related to its implementation, and evaluates the density and centrality of themes. RSL results highlighted Yong Geng as the author, the Journal of Cleaner Production as the journal, China as the country, and the Delft University of Technology as the institution. Bibliometric analysis demonstrated a significant shift in EC themes, transitioning from "Recycling" to "Circular Economy" as the central theme. It also showed a conceptual expansion, including Chemical Substance, Technology, and Urban Development. The findings of this research confirm conclusions from previous studies and provide a comprehensive and updated view of emerging trends in the Circular Economy. However, it is limited to Scopus and WoS databases, focusing on the interconnected circular economy in general.