Sherpa tug starts raising orbit more than a month after launch
Propellant leak forces Sherpa tug off SpaceX rideshare mission
Benchmark green propellant thrusters installed on Sherpa tug
Spaceflight announces Sherpa tug with electric propulsion
Spaceflight planning three Sherpa launches in 2021
SpaceX delays force Spaceflight to find alternative launches
Spaceflight Industries Raises $20 Million