A team of astronomers he made a incredible discovery using a powerful radio telescope in India. They picked up a radio signal coming from a very distant galaxy, called SDSSJ0826+5630located in Ben 8.8 billion light years from the earth. This discovery it was possible thanks to a technique called gravitational lensa phenomenon in which the gravitational pull of a nearby galaxy distorts the light of a more distant galaxy, creating an actual “natural telescope” in the space.
The radio signal, emitted when the universe he just had 4.9 billion years, traveled through space for 8.8 billion years before reaching our instruments. This gives us a rare window into the past remote of the universe, allowing us to observe cosmic events and objects as they were billions of years ago.
Radio signal: low frequency radio telescopes and their importance
Radio astronomy deals with the study of the sky through radio frequencies. Any type of electromagnetic radiation, from light visible infrared, rays rangeto the rays X and radio waves, offers a unique piece of the cosmic puzzle. Low-frequency radio telescopes are crucial for explore the invisible universe to the human eye and to understand otherwise unobservable cosmic phenomena.
The recent observation confirms that we can observe distant galaxies even with these instruments, expanding enormously our ability to scrutinize the universe in ways that were previously thought impossible. Continue to use and improve radio telescopes to detect waves radio from deep space is essential for a more complete understanding of the cosmos.
Have you ever wondered how much more we can discover about the universe with the radio astronomy?
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