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Sculpture at the Compact Array of the stretching of light coming from distant galaxies by the expansion of the universe. Space itself is expanding so the light waves get stretched to longer wavelengths as it travels from a distant galaxy to us. This produces the redshift of the galaxy spectra we see. In the background is a small steerable dish visitors can move around with their hands. The "People's Receiver" is connected to an audio system to convert radio waves into sound waves. When the dish is focussed on a strong radio source (bright in the radio band such as the Sun or Jupiter), you'll hear an increase in the static.