Author: K M Shariat Ullah
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Why is there radiation coming from the outer space?
Recently, a headline caught the public’s eye: “Radio signals coming from alien worlds, scientists worried.” While intriguing, the headline was quite misleading. The truth is, radio signals from space are not unusual—they’re a regular occurrence. There’s no reason to be alarmed. What’s genuinely fascinating, however, is understanding the cosmic processes that create these electromagnetic signals.…
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Jocelyn Bell: The Woman Behind the Pulsar Discovery
It was 1967. The University of Cambridge, a beacon of knowledge in England, became the stage for a groundbreaking exploration into the origins of the universe. Scientists were determined to trace the faint whispers of the first stars born in the cosmos. To achieve this, a series of radio telescopes was meticulously arranged across the…
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Karl Jansky: The Father of Radio Astronomy
In the early days of telecommunication, static noise often disrupted telephone conversations. Even today, walkie-talkies echo with the same familiar hiss. This disturbance, formally known as “signal noise” or “white noise,” doesn’t belong to the original signal. Instead, it creeps in from external sources, mixing with the main signal and distorting the sound. The result?…