Radio astronomy: Frances Elisabeth Alexander discovered radio signals from the Sun, and in 1967, Jocelyne Bell-Burnell recorded periodic radio pulses (nicknamed LGM Little Green Men) emanating from stars later called pulsars. Previously, in 1937, Grote Reber had built the first radio telescope in Illinois and recorded a strong radio signature from the constellations Cygnus and Cassiopeia. This was the dawn of radio astronomy. In 1933, Karl Jansky of Bell Labs recorded a mysterious background noise from deep space, which he called “star noise.” And astronomy also evolved into the study of violent and frightening events, such as quasars and black holes, including the one at the center of our galaxy, in the constellation Cygnus. Then, in 1945,
