Figure 3-32 Orion as Seen in Visible, Ultraviolet, and Infrared Wavelengths (a) An ordinary optical photograph of the constellation Orion. (b) An ultraviolet image of Orion. (c) A false-color view from the Infrared Astronomical Satellite of the entire Orion asterism. Different colors indicated different intensities of infrared radiation. Clearly, different wavelengths provide different information about various objects in space.