Joint venture

September 9th, 2014
The multiple components of a nuclear weapon body are highlighted in this intentionally simplified mesh. Each part is comprised of numerous subcomponents, fastened together with screws, nuts, bolts, jar-lid-like fittings and more. (Sandia National Laboratories.)

Sandia National Laboratories investigators turn to advanced modeling to test the reliability of the joints that hold nuclear missiles together.


Life underground

August 19th, 2014

A PNNL team builds models of deep-earth water flows that affect the tiny organisms that can make big contributions to climate-changing gases.


Supernova shocks

May 6th, 2014
In this false-color image, NuSTAR data, which show high-energy X-rays from radioactive material, are colored blue. Lower-energy X-rays from non-radioactive material, imaged previously with NASA’s Chandra X-ray Observatory, are shown in red, yellow and green. (NASA/JPL-Caltech/CXC/SAO.)

More than 10 years after simulations first suggested its presence, observations appear to confirm that a key instability drives the shock behind one kind of supernova.