![]() ![]() The radio science instrument even used gravity to see inside worlds. The instrument sent out three different wavelengths of radio waves - known as the X, Ka and S bands - to measure the sizes of particles in the rings and investigate ring structure. ![]() The radio science team also studied Saturn’s rings. Radio signals sent by NASA's Cassini spacecraft to Earth through Saturn's rings revealed the presence of highly unusual regular formations of densely grouped ring particles. “Thus we can infer from our radio signal how much bending there was, how much refraction there was, and from them we determine what the atmosphere’s temperature was.” By repeating the observation, Cassini's radio science team determined the overall structure of Saturn’s atmosphere (and that of its giant moon Titan) in different locations and across seasons, he said. “The amount of bending depended on the density of the atmosphere, and the density of the atmosphere depends on the temperature and pressure of the atmosphere,” French said. ![]() When the signal reached Earth, researchers look at how the signal was “bent,” according to Richard French, team leader for the radio science experiment at Wellesley College, Wellesley, Massachusetts. Researchers used the instrument to study the Saturn system in several ways, such as sending the signal through Titan’s atmosphere, or Saturn’s. ![]() “Even if you place a sheet of paper in its path, we could sense the change in the Earth-received signal,” Marouf said. And despite the more than 900-million-mile (1.5-billion-kilometer) journey the signal took from Cassini to Earth, the instrument was extremely sensitive. “It is the only Cassini experiment whose data you can watch in real time,” said Cassini radio science team member Essam Marouf of San Jose State University. The capturing of the radio signal for the first time, however, does raise important questions and even allows experts to dive deeper into decoding the cosmic evolution of our stars and galaxies.For the radio science instrument, the radio signals that Cassini transmitted to Earth were the experiment, and the NASA Deep Space Network complexes in Australia, Spain and the U.S. This radio signal, coming from the star-forming galaxy, was emitted naturally. However, before you start anticipating and preparing for an alien invasion, just take a breath. Researchers were also able to determine the mass of where the signal was coming from. It allowed researchers to notice the radio signals and determine the gas composition of the far-off galaxy. What does this new radio signal suggest about the universe?įirstly, although faint, researchers could spot the signal due to a natural phenomenon called gravitational lensing. It must be noted that right now, our galaxy is 13.8 billion years old.Īuthor and McGill University Department of Physics post-doctoral cosmologist Arnab Chakraborty said about this discovery, “It’s the equivalent to a look-back in time of 8.8 billion years.”Īstronomers from & have detected radio signals from atomic hydrogen in an extremely distant galaxy, using the Giant Metrewave Radio Telescope #IIScresearch /69q78P38f1 In addition to this, researchers also suggest that the radio signal from the far-off galaxy was sent when the Milky Way galaxy was just 4.9 billion years old. As per reports, till now, a 21-cm line has only been emitted by nearby galaxies. The Monthly Notices of the Royal Astronomical Society journal informed people of this exciting development. Scientists from India and Montreal were able to detect a unique wavelength with the help of the Giant Metrewave Radio Telescope in Pune. Facts about the universe: 9 billion light years away, have we discovered alien life? So, in light of this incredible development, here’s taking a deeper look into what this radio signal signifies as well as other astonishing facts about the universe that scientists have recently discovered. This line is also known as a ‘hydrogen line’ or ’21-centimetre line’ and is used by astronomers to locate other galaxies in our vast universe. The radio signal, which had a unique wavelength, was in the form of an electromagnetic radiation spectral line emitted by neutral hydrogen atoms. This galaxy, named SDSSJ0826+5630, is a ‘star-forming galaxy’ that scientists were able to discover after capturing the signal it was emitting. In what is truly a fascinating discovery, Indian scientists have detected a specific type of radio signal emitting from a galaxy which is located at a distance of about 9 billion light-years from Earth. ![]()
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