Scientists discover radio signal sent by galaxy 9 BILLION light-years away
· Jan 24, 2023 ·

Scientists in India and Canada reportedly discovered a radio signal sent from a galaxy 9 billion light-years away from Earth. It is the first time a radio signal has been captured from that distance.

"A galaxy emits different kinds of radio signals," said Arnab Chakraborty, a post-doctoral cosmologist from McGill University Department of Physics. "Until now, it's only been possible to capture this particular signal from a galaxy nearby, limiting our knowledge to those galaxies closer to Earth."

Chakraborty said the discovery is the "equivalent to a look-back in time of 8.8 billion years."

The Giant Metrewave Radio Telescope in Pune, India, captured the signal, Economic Times reports.


What is special about this signal is that it has a unique wavelength, which is known as a "21-centimeter line" or the "hydrogen line." It is reportedly emitted by neutral hydrogen atoms. The signal was emitted from a "star-forming galaxy", which is titled SDSSJ0826+5630.

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