The majority of satellite propulsion systems are currently either chemical ... using solid metal fuel offers simplified ...

SEOUL, April 14 (Reuters) - North Korea says it has tested a new solid-fuel intercontinental ballistic missile (ICBM), its first known use of the propellant in a longer-range projectile, as it ...

North Korea said Wednesday it had tested a new hypersonic intermediate-range missile powered with solid propellants, extending a run in weapons demonstrations that’s deepening a nuclear standoff ...