Astronomers have unveiled the most extensive two-dimensional map of the universe ever constructed. This monumentalmonumental/ˌmɑːnjʊˈmɛntəl/L3具有重大意义的；巨大的（强调规模或影响）extremely significant or important; of great scale or impact. cartographic achievement encompasses nearly four billion celestial objects, compiled over thirteen years. The survey covers seventy-five percent of the sky, drawing on data from the National Science Foundation's Mayall and Blanco telescopes. This 5.6-trillion-pixel mosaic, rendered in visible and near-infrared light capable of piercing the dust of the Milky Way, represents the culminationculmination/ˌkʌlmɪˈneɪʃən/L3顶点；高潮（指达到最高点的过程）the highest point or climax; the point at which something reaches its peak after a period of development. of over 160 scientists' efforts. Indeed, it required 263,407 telescope sessions to complete.
Led by the Department of Energy's Lawrence Berkeley National Laboratory, the DESI Legacy Imaging Surveys collaboration expects the map to remain the definitive two-dimensional reference of the cosmos for the foreseeable future. The survey, comprising 5.6 trillion pixels, represents not merely a static image but a dynamic legacy dataset. Its synthesissynthesis/ˈsɪnθəsɪs/L3综合；合成（指将不同部分结合成整体）the combination of separate elements into a coherent whole; in astronomy, the integration of data from different wavelengths or sources. of visible and infrared wavelengths allows astronomers to peer through galactic obscurationobscuration/ˌɑːbskjəˈreɪʃən/L3遮蔽；模糊化（尤指星际尘埃对光线的阻挡）the act of obscuring or being obscured; blockage of light or visibility, especially by interstellar dust., revealing structures previously hidden from optical surveys. Arguably, the sheer volume of data—spanning 263,407 telescope pointings—positions it as a cornerstone for statistical analyses of galaxy formation and evolution.
Indeed, the map facilitates the search for rare gravitational lenses and fleeting supernovae. Simultaneously, it provides the foundational data for probing the fundamental physics governing the universe. Notably, prior surveys utilizing the Dark Energy Spectroscopic Instrument on the Mayall telescope suggested that dark energy's influence might be waning. This finding, which challenges prevailing cosmological models, has sparked considerable debate. Conversely, research published in June by the Royal Astronomical Society has contested this hypothesis. This underscores the dynamic and contested nature of this scientific frontier.
Consequently, the map's release carries significant strategic implications for the field. It provides a foundational layer upon which future spectroscopic surveys, such as the primary DESI mission, can build. Furthermore, its application in training machine learning models promises to accelerate the discovery of transient phenomena and anomalous astrophysical objects, effectively automating the initial stages of cosmic reconnaissance. This convergence of big data and advanced analytics underscores a paradigmparadigm/ˈpærədaɪm/L3范式；典范（指科学或思想体系中的模式）a typical example or pattern; a conceptual framework within which scientific theories and practices are constructed. shift in observational astronomy.
