Multiple choice general knowledge science & technology What were detected in space for the first time in 1938? Radio Waves Martians Gamma Rays Infra Red Light Reveal answer Fill a bubble to check yourself A Correct answer Explanation Radio waves from space were first detected in 1938 by Karl Jansky, an American radio engineer working at Bell Labs. He discovered radio emissions coming from the center of the Milky Way galaxy, founding the field of radio astronomy.