![the 85-2 and 85-3 radio telescopes](https://i0.wp.com/greenbankobservatory.org/wp-content/uploads/2016/07/GB68_04650b_gbi026crop.jpg?resize=700%2C457&ssl=1)
Three scientists won the 2020 Nobel Prize in physics for their study of the super massive black hole that sits at the center of our galaxy. This black hole, Sagittarius A*, as it’s known, was first discovered as a bright radio object in 1974 at the Green Bank Observatory.
Bruce Balick and Robert Brown used three radio dishes and a fourth smaller dish about 35 km away to form an interferometer.
Watch the full story here, produced by Bruce Young of WDBJ News 7 in Lexington, Virginia.
Learn more about interferometers here.