A new study reported in May 1st that a new study showed that if there were enough satellites around the world, humans could use astronomical telescopes to find extraterrestrial civilizations. According to the study, if advanced extraterrestrial civilizations put enough satellites into their own synchronous satellite belts, the spacecraft could form a circular structure of large density visible from the earth. Hector and Navarro, the first author of the study and the Canary Islands Institute of astrophysics, said: although the opportunity... Its not big, but the key is that its free. SASAS Navarro simulated the existence of a synchronous satellite belt around exoplanets to see if they could be detected by instruments such as the Kepler space telescope of the United States National Aeronautics and Space Administration (NASA) and the TESS, which was recently launched by the agency. He found that the synchronous satellite belt needs to reach a specific degree of integrity to be detected by the spacecraft, whether it is a few small satellites or a few large, large, urban - sized objects that make up the synchrotron satellite. SASAS Navarro called the hypothetical synchronous satellite band structure CEB, named after the famous science fiction novelist, Arthur C Clark. The secret of planetary luminance Astronomers have confirmed that there are many planets outside the solar system, and new discoveries have been made. Both the Kepler space telescope and TESS use the so-called transit method to detect planets. Spacecraft need to observe a star system for a long time. If a planet has a proper orbit and the time is right, then from the perspective of the telescope, the planet will lead to a small drop in the stars brightness when it passes through its main star, and this may be detected. Sox Navarro is not only an astrophysicist, he also hosts radio programs and podcasts. He said that these work helped him to put forward the idea of CEB. One day, a listener asked if the sun had a synchronous satellite. When I was thinking about this problem, I saw a satellite passing through the image of the suns circle, said Navarro. Let me ask myself a question: can satellites be observed around distant exoplanets during transit, he said. Enough objects (or spacecraft) around an exoplanet will cause star brightness to drop slightly before and after the exoplanet transit. Scientists used this method to discover the rings of extrasolar planets. The presumed extraterrestrial satellite signal, said Navarro, has a distinctive feature similar to a halo signal - the CEB and the rings are all made up of a group of objects running around a planet - but this distinctive feature has subtle technical differences in appearance. The signal will also reveal the height of the moving objects, providing an important clue for people to judge whether these objects are natural or made by aliens. The planetary ring system does not have a fixed distance from the planets surface. But Navarro said that if the objects were running at the height of the planets synchronous orbit (about 36 thousand kilometers), they were almost certainly artificial. It does not seem so important whether they are large quantities of small objects or a few large objects, Navarro said. He also found that the ideal environment for detecting such a satellite belt is surrounded by a dark red dwarf within 100 light-years from earth. The new study is published in the quarterly issue of the Journal of astrophysics. Satellite density affects the success or failure of detection Astronomers have been searching for ways to detect alien trails for decades. Many of them focus on civilization that is much more advanced than our own. And Navarro said it would be more meaningful to find a civilization at a similar level with us, because we know that at least one ethnic group follows such a technical idea. Search for the Institute for external civilization (SETI) to find radio signals similar to those we accidentally (sometimes intentionally) send into space. Making satellites can also be a step in other civilizations. There are too many conjectures in the study of the possible characteristics of the extremely advanced civilization, said Navarro. The advantage of CEB is that it is looking for technologies that we already know. To make our existing telescopes discover alien satellites, Navarro said, extraterrestrial civilization must be a little ahead of our own civilization. By using data compiled from public resources, the Navarro determined that at least 1738 satellites were flying around the earth, of which about 1/3 were in the earths synchronous orbit. Assuming that each synchronous satellite is about 1 meters long or so wide, Navarro thinks that the earth needs far more satellite bands than the current number of synchronous satellites, so that they can be found by devices like the Kepler space telescope or TESS. Of course, if the objects moving around the exoplanets are larger, the CEB of the exoplanets will be more easily observed. The idea of space elevator is mentioned by Navarro. It can move people from the surface of a planet to a geosynchronous space station that is always in the same place. The combination of space elevators and satellites can produce enough luminance signals to be observed. The sore - Navarro calculation shows that a detectable CEB will require a large number of satellites with a large interval of 100 meters, 1 meters in diameter, or a space city with an interval of 100 kilometers and a diameter of 1 kilometers, or a mixture of both. If we were very lucky, Navarro said, the Kepler space telescope will certainly see it if we have a star in a star system that is observed by the Kepler space telescope in space. The picture is an external survey satellite (TESS). Pictures from NASA website (NASA) TESS is a great hope for extraterrestrial civilization Navarro proposed a reanalysis of the more than 2600 confirmed planets that the space telescope has discovered during the major mission of the Kepler space telescope, and the space telescope has performed extra missions since 2014 to see if they have weak signals from an alien satellite. Researchers at the Kepler Space Telescope use computer programs to screen a large amount of data collected by the task and identify extrasolar planets, and teams looking for planetary and exoplanet satellites will also use algorithms. Whether a project can detect CEB depends on how the project is set. TESS added that TESS is more likely to find CEB than the Kepler space telescope, because it is expected that TESS can find more planets around the red dwarf than the Kepler space telescope. NASA officials say TESSs work is just beginning, and the glorious journey of the Kepler space telescope is coming to an end. The fuel of the telescope is about to run out and may stop in a few months. This article source: Reference News Net editor: Zhang Zutao _NT5054 Navarro proposed a reanalysis of the more than 2600 confirmed planets that the space telescope has discovered during the major mission of the Kepler space telescope, and the space telescope has performed extra missions since 2014 to see if they have weak signals from an alien satellite. Researchers at the Kepler Space Telescope use computer programs to screen a large amount of data collected by the task and identify extrasolar planets, and teams looking for planetary and exoplanet satellites will also use algorithms. Whether a project can detect CEB depends on how the project is set. TESS added that TESS is more likely to find CEB than the Kepler space telescope, because it is expected that TESS can find more planets around the red dwarf than the Kepler space telescope. NASA officials say TESSs work is just beginning, and the glorious journey of the Kepler space telescope is coming to an end. The fuel of the telescope is about to run out and may stop in a few months.