Jiang said his team had also experienced a disastrous risk,that is the fatigue performance of cable that has never been solved worldwide. In the past two years, FAST has covered almost all the scientific objectives it was designed for, including pulsar physics, fast radio bursts, including neutral hydrogen, galaxy formation and evolution, Jiang noted. Jiang said the reason for China to build such a huge telescope is that a larger telescope means a larger optical area and a stronger ability to detect weak signals, which can greatly expand the number of observable samples and help humans detect distant phenomena in the universe.įAST has been in operation for nearly three years, and has made fruitful achievements, including the discovery of more than 740 pulsars, making it the most efficient pulsar discovery telescope in the world during the same period. It is believed to be the world's most sensitive radio telescope. FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. (Xinhua/Ou Dongqu)Ĭhina's five-hundred-meter Aperture Spherical Radio Telescope (FAST) has discovered more than 740 new pulsars so far, said Jiang Peng, chief scientist of FAST and a deputy to the National People's Congress, at the deputies' passage of the first session of the 14th National People's Congress (NPC) on Tuesday.įAST, also known as the "Eye of the Sky," is located in a naturally deep and round karst depression in Southwest China's Guizhou Province. With FAST, scientists have identified over 660 new pulsars. Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. An antenna is such a conductor: it intercepts radio waves, which create a feeble current in it.Aerial photo taken on Jshows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance at sunset in southwest China's Guizhou Province. ![]() Radio waves can produce a current in conductors of electricity such as metals. Just as vibrating charged particles can produce electromagnetic waves (see the Radiation and Spectra chapter), electromagnetic waves can make charged particles move back and forth. Nevertheless, there is information in the radio waves we receive-information that can tell us about the chemistry and physical conditions of the sources of the waves. If cosmic radio signals were translated into sound, they would sound like the static you hear when scanning between stations. ![]() The radio waves we receive from space do not, of course, have music or other program information encoded in them. These must be decoded at the other end and then turned back into sound by speakers or headphones. ![]() In commercial radio broadcasting, we encode sound information (music or a newscaster’s voice) into radio waves. Like light, radio waves are a form of electromagnetic radiation, but unlike light, we cannot detect them with our senses-we must rely on electronic equipment to pick them up. It is important to understand that radio waves cannot be “heard”: they are not the sound waves you hear coming out of the radio receiver in your home or car. During the first decade, he worked practically alone because professional astronomers had not yet recognized the vast potential of radio astronomy. Over the years, Reber built several such antennas and used them to carry out pioneering surveys of the sky for celestial radio sources he remained active in radio astronomy for more than 30 years. ![]() In 1936, Grote Reber, who was an amateur astronomer interested in radio communications, used galvanized iron and wood to build the first antenna specifically designed to receive cosmic radio waves. This rotating radio antenna was used by Jansky in his serendipitous discovery of radio radiation from the Milky Way.
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