Michelle P.
Google
The SMA is a type of multiple-antenna observatory known as an interferometer, in this case consisting of eight radio dishes, each 6 meters in diameter. The eight antennas observe the same astronomical object simultaneously. Combining the light measured by all the dishes produces an interference pattern, which results in a sharper image than could be made by any of the individual antennae. You can't really visit or talk to any of the scientists that operate it, but it's still awesome to see it and take pictures!