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This interactive, web-based activity allows children to see the universe in many different wavelengths of light - light our eyes can and cannot see. To use the viewer, first select a celestial object (planet, galaxy, etc.), then select an electromagnetic wavelength range to view it (e.g., visible, ultraviolet, infrared). Images are from various ground- and space-based telescopes. In addition, background information is provided on the electromagnetic spectrum and selected telescopes designed to detect specific regions of light.