Is the electromagnetic spectrum the entire range of electromagnetic waves?
, but cosmic radiation may be detected at that range. NASA is trying to find and research ultra-high emissions of gamma-rays, because observing them on earth may diffuse the energy as it may traverse through our atmosphere. There are currently a number of projects (such as OWL and MILAGRO) being developed that will collect ultra-high energy gamma-rays from cosmic sources, especially from the Crab Nebula.