Is everybody fired up for this Thursday's Space Launch System engine test? Scheduled this week on August 13 is a test fire of the mighty RS-25 engine at John C. Stennis Space Center in #Mississippi. Follow our feed all week long for the back story on the engines that powered space shuttle missions that helped to build the International Space Station (iss) and that will power future missions to Mars. Shown here, Space Shuttle Atlantis's three Block II RS-25D main engines at liftoff during the launch of STS-110. This image was extracted from engineering motion picture footage taken by a tracking camera. Credit: NASA / c. 2007 #SLSFiredUp #JourneyToMars #NASA #progress #enginetesting #rocketscience #smokeandfire #heritage #spaceshuttle #spacestation #iss #nasahistory #mississippi #madeinusa nasastennis nasa_marshall nasa