A notable feature of the P-800 Onyx missile is its two-stage propulsion system: an initial solid fuel rocket unit or booster, and a follow-up liquid fuel jet engine.

A Falcon 9 rocket launched by Elon Musk's SpaceX earlier this month has made a temporary hole in Earth's ionosphere, American space physicist Jeff Baumgardner has claimed. Falcon 9, a reusable two ...