It uses real astronomical catalogs for known objects (like the Milky Way, nearby stars, and exoplanets) and procedural generation to fill in the rest of the observable universe with billions of galaxies and star systems.
Files with this specific naming convention—especially those found on third-party file-sharing sites or forums—are often associated with of the software. SpaceEngine.v0.990.45.1940.part03.rar
Downloading split RAR parts from unofficial sources carries a high risk of containing malware or bundled "adware." It uses real astronomical catalogs for known objects