Alpha Particle X-Ray Spectrometer (APXS) Carried on Board the Curiosity Rover
The Alpha Particle X-Ray Spectrometer (APXS) measures the abundance of chemical elements in the rocks and soil on Mars. Roughly the size and shape of a Rubik's cube, the APXS's sensor can gather data day and night. It takes two to three hours to analyze a sample to determine its constituent...
Canadian Space Agency