Image - It's a bird, it's a plane, it's . . .

Image of the week - It’s a bird, it’s a plane, it’s . . . Image courtesy Pierre Auger Observatory . . . it’s an artist’s conceptual simulation of two independent ways to see cosmic rays coming in from space. At the Pierre Auger Observatory in Argentina, an array of surface detectors is used, as well as a collection of air fluorescence telescopes. The two systems complement each other, allowing researchers a better chance of being sure to see their rare, high-energy quarry.