NASA Test-Fires Engine for Most Powerful Rocket Ever

NASA engineers blasted an RS-25 rocket engine for 7 minutes yesterday (Aug. 18) at the Stennis Space Center in Mississippi as part of a development test for hardware that will make up the most powerful rocket ever. Four RS-25 engines, built by Aerojet Rocketdyne, plus two solid rocket boosters, will propel NASA's new Space Launch System (SLS) rocket off of Earth and onward into deep space. The rocket is NASA's chosen vehicle to reach Mars.