New Way to Tame a Rocket Engine

Combustion instabilities can make a rocket engine have a really bad day. High frequency combustion instabilities are periodic oscillations of combustion that occur due to the coupled interaction between unsteady heat release from combustion, acoustic fluctuations within the combustor, and perturbations of the incoming propellant.

These instabilities become […]

Fermi Improves its Vision for Thunderstorm Gamma-Ray Flashes

Photo Credit: NASA / Jim Grossman

WASHINGTON — Thanks to improved data analysis techniques and a new operating mode, the Gamma-ray Burst Monitor (GBM) aboard NASA’s Fermi Gamma-ray Space Telescope is now 10 times better at catching the brief outbursts of high-energy light mysteriously produced above thunderstorms.