This specific 3D model, "Astronaut Spacesuit 3D Model 3D model 6", is an asset made available by "Unknown author".
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STL (Stereolithography, filesize: 71.5 MB), OBJ (OBJ, filesize: 103 MB), PNG (PNG, filesize: 51.3 MB), USDZ (USDZ, filesize: 128 MB), FBX (Autodesk FBX, filesize: 180 MB), GLTF (glTF, filesize: 74.9 MB)