NuSTAR Observatory

NuSTAR will observe X-rays from astronomical objects. X-rays are similar to the light to which our eyes are sensitive, but have a much higher energy. Observing X-rays from objects in space is more difficult than seeing them in optical light, because X-rays can pass right through a glass mirror. Perhaps worse, X-rays are absorbed by Earth's atmosphere, so the observatory must be launched into space. So, to push back the frontiers of the science of black holes, supernovae, and active galaxies, NuSTAR must have special mirrors, special detectors, and be in space to use them.