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| This sign says "38,778 aluminum panels form the largest reflector on the earth. Each panel is individually adjusted to produce a spherical curvature with a 2mm precision. The reflector weighs 300 tons". SETI (Search for ExtraTerrestrial Intelligence) scientists use the equipment to monitor natural radio emissions from distant galaxies, pulsars, and quasars. Using powerful radar signals, they can also study the ionosphere, planets, and moons of our system. |
