From moon’s far side, a satellite to look for the first radio signal
The 21-cm radio signal emitted by neutral hydrogen is like the proverbial needle in a haystack as it is buried beneath foreground radio emissions thousands of times stronger. To isolate it and reveal how the first stars and galaxies formed is a great challenge even for advanced platforms like the planned CosmoCube and India’s PRATUSH
· 9/8/2026, 8:32:44 AM· 2 min read
The 21-cm radio signal emitted by neutral hydrogen is like the proverbial needle in a haystack as it is buried beneath foreground radio emissions thousands of times stronger. To isolate it and reveal how the first stars and galaxies formed is a great challenge even for advanced platforms like the planned CosmoCube and India’s PRATUSH
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