![On August 13, 2015, an RS-25 engine underwent a hot-fire test to examine its ability to withstand the extreme temperature and pressure conditions that will occur during an actual SLS launch. Photo Credit: NASA](https://appel.nasa.gov/wp-content/uploads/2015/08/RS25-Engine-Test-670x380.jpg)
NASA took a step farther along the journey to Mars with a successful hot-fire test of the RS-25 engine that will form part of the core stage of the Space Launch System (SLS).
NASA took a step farther along the journey to Mars with a successful hot-fire test of the RS-25 engine that will form part of the core stage of the Space Launch System (SLS).
The Academy recently introduced new resources to help practitioners maximize their learning opportunities before and after attending APPEL courses.
Forty years ago this month, Viking 1 left Earth on a technologically and scientifically challenging mission designed to answer the question: Are we alone in the universe?
Renowned as a unique research platform for issues affecting human spaceflight, the applications of the International Space Station (ISS) continue to expand.
Faced with potentially mission-ending challenges, the Kepler team altered its approach and is now more efficient than ever at identifying Earth-like exoplanets.
The International Space Station (ISS) is a unique platform for discovery. A recent report from the Government Accountability Office (GAO) focuses on maximizing its value and utility.
With its historic Pluto flyby, the New Horizons mission ushers in a new era of solar system exploration that may have implications for worlds closer to home.
At a recent knowledge management conference, APPEL instructor Anthony Luscher discussed the value of case study-based learning for engineering design.
The crew of Apollo 11, the first mission to land humans on the moon, expected a hostile lunar environment. Instead, they stepped out into a surprisingly inviting world.