the true game-changers are in the engines that power these spacecraft — the Blue Engine-4 (BE-4) and Raptor. Compared to more "conventional" rocket engines, BE-4 and Raptor are cheaper ...

United Launch Alliance’s next-generation Vulcan Centaur rocket… Read More Jeff Bezos’ Blue Origin space venture confirmed that one of its BE-4 rocket engines suffered a significant anomaly ...

and promised that next-generation BE-4 engines would be rolling off… Read More Amazon billionaire Jeff Bezos’ Blue Origin space venture has signed an agreement with NASA for the use of a histo ...