Telescopes are engineered to detect a specific range of wavelengths of electromagnetic radiation. Images from a variety of these telescopes show different aspects of the same astronomical objects. To trained eyes, each of the images in this collection produced for Teachers' Domain contributes details that provide a more comprehensive understanding of the observed object than is possible from a single image. Radio images highlight the presence of cooler gas clouds (especially hydrogen), infrared images show areas of low-energy heat, visible light images depict primarily gases and dust, and x-ray images reveal high-energy heat emissions.
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