BREAKING: Earth just received a radio signal sent from a galaxy that is 9 billion light years away

It is the first time that scientists have detected a signal that originates from another galaxy located 9 billion light years away from Earth. The radio signal was captured by the Giant Metrewave Radio Telescope located in Pune, India. The giant radio telescope includes a field of 30 dish antennas all pointed skyward with each dish about 150 feet in diameter. Using this sophisticated telescope, scientists detected a unique radio signal with a unique wavelength known as the 21-centimeter line or the hydrogen line. This signal is emitted by neutral hydrogen atoms. Unfortunately, this unique signal did not come from aliens. It is emitted from a galaxy called SDSSJ0826+5630. The galaxy is a "star forming galaxy." The fascinating aspect about the radio signal is that it was emitted when the Milky Way Galaxy (Earth is a part of the Milky Way Galaxy) was just 4.9 billion years old. Currently, the Milky Way Galaxy is estimated to be 13.8 billion years old. Hence, it took 9 billion years for the signal to reach Earth. For the scientists, the radio signal is one way to look back in time 9 billion years ago. There have been other radio signals detected from nearby galaxies but this is the farthest signal detected so far. The radio signal from SDSSJ0826+5630 has allowed the scientists to measure the mass and gas content of the galaxy. Using this information, scientists determine that the far-off galaxy may have double the mass of stars which are visible from Earth. The study involving the discovery of this radio signal was just released in January 2023.


  1. Perhaps it’s not a radio signal but something that sounds like one.


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