A research team led by the University of Bologna is closing on building a space propulsion system that will use water as fuel ...

Arkadia Space's DARK propulsion system, using hydrogen peroxide propellant, was flown on a D-Orbit ION vehicle launched in March. Credit: Arkadia Space WASHINGTON — Spanish startup Arkadia Space has ...

Human crews headed for Mars are still looking at journeys that last most of a year, long enough for radiation, boredom and mechanical risk to pile up. Nuclear propulsion promises to compress that ...