Abstract: Circular mass accelerators for off-world applications are disclosed herein. An example system includes a base assembly that is configured to interface with a supporting surface, a vertical support assembly extending from the base assembly, a first drive positioned, a shaft connected to the first drive, a hub assembly having a spool, the hub assembly being coupled to a second drive that is located on a terminal end of the shaft, a first tether and a second tether that can be spooled onto and unspooled from the spool by the second drive, and payloads positioned each of the tethers, the payloads being releasably coupled to tethers in such a way that the payloads can be released upon the payloads being rotated to a target launch velocity.