Twelve hours after the US and Israel began bombing Iran on February 28, 2026, a shortwave radio signal started broadcasting in Persian - a man's voice, counting random numbers, followed by the word ...

Sunspot region 4114 has unleashed its most powerful solar flare yet — an X1.9 class that erupted late June 19, triggering shortwave radio blackouts across the Pacific Ocean, including parts of Hawaii.

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have searched the skies for alien radio signals for more than 60 years, but all they’ve heard so far is what Search for ...

In this handout photo provided by NASA, an MDI image shows giant sunspots 486 and 488. Credit: NASA via Getty Images Beyond their love of radio, amateur radio operators and shortwave radio ...