Halo Belt

As the last missing piece of data in the curvature engine theory was filled in, mankind began an unprecedented era of "cosmic navigation", and its footprints spread across the galaxy like a line that reproduces. Just when humans wanted to reach out to other galaxies, their legs were interrupted by "intergalactic space"—— No matter how sophisticated the spacecraft is, as long as it flies out of the galactic halo zone, it will be pulled by a strange force. The further away from the galactic halo zone, the stronger this force will be, until the spacecraft will be completely torn into pieces. It's just that humans never stop. In order to figure out what the strange external force is, humans have established multiple bases on the edge of the galactic halo belt.