Opportunity recently took a look at the tools at the end of its own robotic arm. The cylinder at the top left is the Alpha Particle X-Ray Spectrometer, which analyzes the elemental composition of rocks and soil. The circular object at the center is the Mössbauer Spectrometer, which analyzes iron in objects that it touches. At the top right, seen from the side, is the Rock Abrasion Tool (RAT), which grinds away the outer surface of rock to expose fresh material lire cet article. Learn more about the instruments and what they do eriacta 100mg canada.