![]() This silence enables the observatory to detect energy in outer space that is equivalent to the energy emitted by a single snowflake hitting the ground. The quiet zone aims to protect sensitive radio telescopes at the National Radio Astronomy Observatory, as well as a nearby Naval research facility, from man-made interference. Seemingly off the beaten path, this community of fewer than two hundred residents is the heart of the National Radio Quiet Zone, a 13,000-square-mile area where state and federal laws discourage the use of everyday devices that emit electromagnetic waves. And other than the occasional passing pickup truck whose driver offers a wave, it's dead silent. A cell phone signal is an hour away by car. In these parts, a pay phone is a visitor's best option for reaching the rest of the world.
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