We went to Green Bank Saturday, which is home of the National Radio Astronomy Observatory.

Green bank is the center of the National Radio Quiet Zone, to reduce the amount of radio interference the telescopes pick up. The most obvious thing this means is that there is no cell phone reception. But it’s a lot more than that. Once you go past the gate, you cell phones must be turned off as must all digital cameras, so I was unable to take any pictures up close to the telescope. (You can buy disposable cameras at the gift shop, as they don’t cause interference.)

But it’s more than that.

On site, all electronic equipment–including microwave ovens–must be kept in Faraday cages. And locals occasionally receive visits from Green Bank personnel, who then fix their faulty electronic equipment (such as microwave ovens).

The telescopes operate 24 hours a day, seven days a week, and anyone can write a proposal for project.

The telescope sits on four wheeled stands that are a bit like train cars, which allow the telescope to rotate a full 360 degrees to point in any direction.

The angle of the dish can also be changed. The thick white arc with the black stripe running down the center contains teeth that allow the position of the dish to be raised and lowered.

The dish of the main telescope is larger than a football field, so it can been seen from quite far away.

There are multiple telescopes on site, to take advantage of the radio quiet zone.

And in the science center, there is a scale model. I took several pictures of it, if you’d like a better look the structure.