Hera’s Propulsion Module incorporates its propellant tanks – housed within a central titanium cylinder, the ‘backbone’ of the spacecraft – along with piping and thrusters, which will have the job of hauling the mission across deep space for more than two years, then to manoeuvre around Dimorphos and Didymos. This module was mated with Hera's Core Module at OHB Bremen to complete the spacecraft structure.