The engines were built by L3Harris and sent for integration with the SLS rocket's core stage.

Jeff Thornburg helped turn a government research project into SpaceX’s most powerful rocket engine. Now, he’s trying to do the same thing at his startup Portal Space Systems, which is taking an idea ...

Welcome to Edition 9.01 of the Rocket Report! Back in January, I wrote about the 20 launches and landings we were most ...

One of them is Unastella, a four-year-old South Korean startup that just closed a $24 million Series B, bringing its total funding to $44 million. The company launched its own rocket, the UNA ...

Three of the four RS-25 engines powering the Artemis II mission previously flew on NASA’s Space Shuttle fleet. The engines are cooled by liquid hydrogen to prevent the nozzle from melting from the ...

Critical Energy is turning rocket engines into geothermal power plants, and it wants to build 300 GW per year by 2045.

The only people who value ease of maintenance at a cheap cost to manufacture, more than NASA, are people cruising Craigslist and eBay for a low-mileage 350 small-block Chevy motor at three in the ...

The Artemis II mission is set to launch four astronauts atop NASA's SLS (Space Launch System) rocket later today – and while this specific rocket is only flying on its second mission, its core stage ...