By integrating precise stellar parameters from LAMOST with low-resolution spectroscopic survey data from Gaia, astronomers compiled the first comprehensive catalog detailing the absorption and scattering from interstellar dust for over 130 million stars. Using this catalog, they have successfully constructed a 3D map of dust distribution and properties across the Milky Way, reaching distances of up to 16,308 light-years away.

　　This milestone achievement leverages LAMOST's unique advantages, including its large field of view and multi-object spectroscopic capabilities, Zhang said.

　　The 3D map covers vast spatial scales, revealing close correlations between dust properties, star formation and the structure of the Milky Way. It provides critical insights for research in the areas of astrochemistry and galactic evolution, he noted.

　　In addition, the observation of dust distribution challenges long-standing expectations related to the intermediate-density regions near dust cloud centers, and suggests potential new mechanisms for interstellar organic matter growth, Zhang said.

　　“Dust serves as the building material for planets like Earth and plays a catalytic role in the Milky Way's chemical evolution. The newly released 3D map opens a new window for the study of dust and the Galaxy. It not only offers a vital reference for astronomical observations but also provides fresh perspectives and possibilities for the exploration of astrochemistry, star formation, the galactic carbon cycle, and even the origin of life,“ he said.