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• n  an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m

• radio wave
• radio radiation

News & Articles

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• Enigmatic Flashes from the Edge of the Cosmos
  They come from somewhere in the distant universe--probably some 6 billion to 11 billion light years away. They don't last very long, only about one-thousandth of a second. They happen all the time, up to 10,000 times a day. They create intense bursts of radio emission but nothing else--no light, no x-rays, no other visible evidence. And nobody knows what they are. Until now, nobody was even sure ...
  July 5, 2013 - Discover