In the early 1930s, Bell Labs engineer Karl Jansky embarked on an investigation into transatlantic radio interference. By constructing a large antenna to trace an enigmatic hiss, he uncovered a signal that deviated from known sources. This signal, which followed a sidereal day cycle, indicated a celestial origin. Jansky's serendipitous discovery not only identified radio emissions from the galaxy's center but also pioneered the exciting realm of radio astronomy.