Relativity Space tests full-scale massive Terran Aeon R engine: fully reusable and fully 3D printed this could be the future of accessing space

https://thespacebucket.com/relativity-space-just-tested-the-first-full-scale-aeon-r-engine/

"268,000 pounds of maximum thrust... liquid oxygen plus liquid natural gas eventually easily made on Mars... ilaunching over 20,000kg to low Earth orbit... launch from Cape Canaveral 2024... from raw material to rockets within 60 days... 3D printed 7X faster... horizontal printers print objects up to 120' long and 24' wide, resulting in increased volume capacity of 55X... Reduced print start time and cost... five signed customers for Terran R, including multiple launches and totaling more than $1.2B in backlog"

Related: Plasma thrusters used on satellites could be much more powerful than previously believed

https://phys.org/news/2023-01-plasma-thrusters-satellites-powerful-previously.html