LISA Pathfinder was a space mission by the European Space Agency. It was launched on 3 December 2015 on a Vega rocket, and operated until July 2017. The mission tested key technologies needed for the
Model of the LISA Pathfinder spacecraft
One of the two gold-platinum test masses, used as gravitational references and laser end-mirrors on LISA Pathfinder.
LISA Pathfinder exploded view
Pluto new horizons 2015 07 14 01
Busek Company Incorporated is an American spacecraft propulsion company that builds thrusters, electronics, and various systems for spacecraft.
Concept art of the Lunar Gateways' Power and Propulsion Element with Busek Hall effect thrusters (outer pair on each side)
Busek's BHT-200 hall effect thruster
Busek's BIT-3 ion thruster operating on several propellants