Quiet Zone: 707

Michael Holstine, business manager at the National Radio Astronomy Observatory, stands on a platform atop the Robert C. Byrd Green Bank Telescope. Observatory employees regularly patrol a 10-mile radius surrounding the facility to mitigate electromagnetic interference emitted by everyday items like cordless phones, wireless routers, microwave ovens and even electric blankets.

Michael Holstine, business manager at the National Radio Astronomy Observatory, stands on a platform atop the Robert C. Byrd Green Bank Telescope. Observatory employees regularly patrol a 10-mile radius surrounding the facility to mitigate electromagnetic interference emitted by everyday items like cordless phones, wireless routers, microwave ovens and even electric blankets.