One of those detections was EP240408a, an unusual blast that lit up discussions between astronomers. Zhang and his colleagues ...

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When a radio signal is broadcast from a transmitter, some of it disappears upwards into space and is lost. However, during certain weather conditions, the “lost” signal can be bent back ...

Just like the glow of a flashlight, the light from the transmitter widens and weakens with distance. Without amplification, ...

When a television signal is broadcast from a transmitter, some of it disappears upwards into space and is lost. However, during certain weather conditions, the “lost” signal can become bent ...

In 1974, the most powerful broadcast ever deliberately beamed into space was made from Puerto Rico ... The broadcast was particularly powerful because it used Arecibo's megawatt transmitter attached ...

This means that most ground-based transmitters will appear to have a constant frequency, much like the test signal shown above. Signals from deep space will show a drift in frequency due to the ...