Tiangong two contains a timing God needle 30 million error 1 – Sohu news 3edyy

Tiangong two contains a "timing God needle": 30 million error 1 – Sohu news according to Xinhua news agency, the successful launch of Tiangong two, equipped with a variety of sophisticated scientific equipment. Among them, the Chinese Academy of Sciences Shanghai Institute developed the "timing God needle" — space atomic clock, is expected to achieve ultra high precision error about 30 million years a second, this will be the first international space atomic clock in orbit and to carry out scientific experiments in space, is currently running the highest accuracy of atomic clock. The development of human society can not be separated from the accurate measurement of time. In the past, the atomic clock running in space is a hot atomic clock, the highest accuracy corresponds to 3 million years error. The temple, by the space atomic clock is equipped with two laser cooling technology into space in the space microgravity environment, further time accuracy increased by 10 times the mean error of the clock running for 30 million years will have a second! So exactly what is the role of the clock? Chinese Academy of Sciences Shanghai Institute of quantum optics laboratory director Liu Liang introduction, in space, space atomic clock can create ultra high precision time and frequency standard. With this benchmark, you can synchronize the clock in the other atomic clock, so that the global satellite navigation system with a more accurate and stable operation. In addition, the development of cold atom technology will greatly improve the accuracy of many experiments, so that the original impossible experiments possible. For example, deep space navigation. Liu Liang said that if Lagrange we are not influenced by gravity in the solar system in each place a cold atomic clock, the human can realize accurate positioning in the solar system the larger range beyond the near range, research space, large scale, including the general theory of relativity is established in the large scale case etc.. At the same time, the space cold atomic clock can measure gravitational redshift. According to the general theory of relativity, the concept of time is not uniform, in Mars, the moon and other gravitational fields, time is not the same. "If there is an atomic clock in the sky, and there is an atomic clock on the ground, then a comparison will show how much time is lost." Liu Liang said. In the near future, the development of the space cold atomic clock may be able to make a lot of conjecture in the world of science and technology to get a clear answer. To explore the "bee" to explore the universe’s most violent explosion according to Xinhua news agency, a square box looks like a cake, but scientists are nicknamed "little bees" detector will be "dropped" in the "top" No. two ", with its complex" eyes "looking for the most shining explosions in the universe — gamma ray bursts, help people understand the intense and brief splendid moment is how to generate. The "bee" name. English, POLAR, called gamma ray bursts polarimeter. Gamma ray bursts are short bursts of gamma rays from cosmic space. Although the gamma ray bursts the duration of the elderly only hundreds of seconds, short is less than tens of milliseconds, but during the energy released almost robbed the entire universe of the limelight, the sum of instantaneous brightness may even more than the other celestial bodies of the universe. The discovery of GRBs is legendary. U.S.A。相关的主题文章:

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