English: This image shows the core of the science hardware of the International Ultraviolet Explorer. The telescope tube and sunshade extend above the pivot point of the support stand, the cameras are just below, and some of the mirrors and diffraction gratings are at the bottom. The box extending from the midpoint of the assembly covers the location of the spacecraft gyros. The small structure near the top of the tube, just below the angled sunshade, is likely one of the S-band downlink antennae. This was subsequently removed and installed on another part of the spacecraft when it was realized that this location would interfere with the shroud covering IUE during launch.