adio spectrum issues in radio astronomy

Cosmic radio emissions were first detected more than 90 years ago while searching for the origin of the weak static that was causing interference to communications.This opened a new discovery window into our universe and since then radio astronomy has revolutionized our view of the Universe through the discovery of quasars, pulsars, the Cosmic Microwave Background, surveys of our Galaxy in the 21-cm hydrogen line, molecular lines, and many other phenomena.