Going up the spectrum, repeat after me Radio, infrared, visible, UV Keep going all the way what do you see? That's X-rays, gamma rays, high energy An X-ray photon has a high frequency Which means a shorter wavelength than you could ever see X-rays come from various processes Like a cloud of gas above about a million degrees Or magnetic fields that send electrons swarming like bees Or even neutron stars emitting like black bodies And you get X-rays from star stuff that came near to and fell Into a black hole's gravitational potential well If we flew above the atmosphere and looked out at the skies And if we could do it with X-ray eyes We'd see more flashing and popping than you realize Objects winking on and off like fireflies The X-ray sky isn't calm and quiet It's more like a rockin' high energy riot X Rays, Gamma Rays, high energy Hot stars, heavy stars, high density Quasars, black holes, supernovae Powerhouses lighting up the Galaxy Flashing, bursting, pulsing objects we could see If we had X-ray eyes, if we had X-ray eyes