The Alpha Particle X-ray Spectrometer on the Opportunity rover determined major and minor elements of soils and rocks in Meridiani Planum. Chemical compositions differentiate between basaltic rocks, ...

S134-E-007532 (20 May 2011) — The starboard truss of the International Space Station is featured in this image photographed by an STS-134 crew member while space shuttle Endeavour remains docked with ...