Astronomy Picture of the Day . The Radio Sky: Tuned to 408MHz . ... 14.12.1997 . ... MPIfR , SkyView Explanation: Tune your radio telescope to 408MHz (408 million cycles per second) and check out the Radio Sky! ... In the 1970s large dish antennas at three radio observatories, Jodrell Bank , MPIfR , and Parkes Observatory , were used to do just that - the data were combined to map the entire sky. ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: radio . ...