Scientists

Some scientists have created a camera that detects faces at 100 km

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China continues to progress without technology brakes. Although many innovations focus on the civil sphere, others reinforce their military and intelligence power. Proof of this is an experimental system that promises to analyze objects kilometers away. We are talking about a technology that could promote an important leap in its espionage capabilities. The information comes of South China Morning Postwhich details how a team from the Aerospace Information Research Institute of the Chinese Academy of Sciences has achieved successful observations with an innovative laser system. This operates in optical wavelengths and helps obtain huge distance images, if certain conditions are met. A new observation system As we can see in the visual representation, the researchers displayed the system on a shore of the Qinghai lake, an immense Alpine lake in the remote northwest of China. On the other side, to 101.8 km awayThey installed a set of reflective rhymes. The impressive thing is that, despite the huge distance, the system managed to distinguish details of just 1.7 mm wide. The laser makes the difference. They say that it reaches an accuracy of 15.6 mm when measuring distances, which theoretically leaves the spy and telescope chambers with lenses, surpassing them by a factor of 100. Now, the observations must be made with optimal climatic conditions, stable wind, low cloudiness and, in observations of the orbit, clear skies. Although the tests have been performed on land, the Hongkonés newspaper points out that this technology could be used for espionage from space. Its unprecedented capacity to capture details would allow Identify faces from orbit Or, in reverse, analyze satellites from adversary countries with great precision from the surface of our planet. If the question is how they have achieved it, the answer is in a combination of innovations. To begin with, the researchers divided the laser beam into a 4×4 microlent matrix, which allowed to expand the optical opening of the 7.2 mm system (0.68 inches) to 68.8 mm (2.71 inches). With this approach, they managed to overcome the usual limitation between the size of the opening and the field of vision. In addition, they incorporated a specialized laser module capable of emitting signals with frequencies higher than 10 gigahecks. Thanks to this, the system reached an extremely fine range resolution, allowing distance measurements with great precision. At the same time, a narrow color spectrum was maintained to improve the resolution of the azimuththus optimizing detail detection. Images | Chinese Academy of Sciences | Bernard Hermant | POT In Xataka | Anuuu is thrown over another problem: China prepares to lead the manufacture of chips for advanced weapons

The oceans of the Earth were green for thousands of years. More and more scientists believe they will be again

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On February 14, 1990, 6,000 million kilometers from Earth, the Voyager 1 He took a photo. There, sustained in space by the mysterious forces of. Space-time, our planet is nothing more than a light blue motor between the sunlight reflected by the camera. Four years later, Carl Sagan baptized that photo as “that pale blue point.” What we just discovered is that it was not always the case. 3,000 million years ago, that point would have been green. Wasn’t it blue? Actually, according to Taro Matsuo and his team from the University of Nagoya in Japan explain in Japanduring most of the history of the earth its surface would not have been blue. For about 3,000 million years and until 600 million years ago (just when complex life begins on the planet) the predominant color seems to have been green. (No) take iron from the matter … The first is that, at that time, the indications tell us that the oceans were full of iron hydroxide. This inorganic compound absorbs blue light. In addition, naturally, water absorbs red light. That means that taking into account that chemical composition, the only free light was the green color. The other reason is the cyanobacteria. It’s about One of the first photosynthetic beings of history and not only used chlorophyll to absorb sunlight, but used fuses to absorb red and green light. The sum of these two things caused the seas to have a characteristic green color. And they had it for billions of years. It is true that it was not a pure green color. After all, blue is “a consequence of dispersion Rayleight of sunlight in the atmosphere. “So the color would tend to blue, but without a doubt it would be something much greener than current. What is the use of all this research? First, to understand that when The MIT explained in 2019that the sea will return green in the mid -century, we are talking about something very plausible. It is not just that A follow -up study In 2023 he confirmed that more than half of the land surface had gained greenery in recent years. It is that, for a long time, it was so. On the other hand, it allows us to answer one of the great questions of astrobiology: “Does only the blue tone of a planet serve as an indicator of its potential to house life?“And the answer, of course, is no: not a ‘non -radical’ is true; but one that reminds us that there are more things out there that can still dream our biology. Image | Georgetan#5 In Xataka | UFOs are a distraction: how astrobiology is our best asset to find extraterrestrial life

Reviewing data almost 30 years ago, scientists believe they have identified a new ocean in one of Jupiter’s moons

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On September 21, 2003 the Galileo probe He was immolated in Jupiter’s dense atmosphere, the planet he had been investigating for almost a decade. 30 years after the arrival of the probe to the Jovian orbit and more than 20 years after the end of its mission, the NASA probe continues to offer us new information thanks to the old data that it sent us in its day. A new oceanic world. The study in question has indicated that Calisto is “most likely” an ocean world, a rocky body covered by a layer of water at least in a liquid. The key to the new study has been in a more exhaustive use of the data provided by the Galileo mission, including all its magnetic measurements. Callisto Callisto It is the satellite farther from your planet of Among the so -called four Galilean moons of Jupiter. It is also the second largest moon of Jupiter, with a simular size to that of mercury but with a remarkably smaller mass. One of the most striking details is its surface full of craters which gives Callisto an appearance “similar to a golf ball” The suspicion that this satellite hid an ocean inside It is not newbut the intensity of his ionosphere had been a limit to our ability to study the interior of the Jovian moon from a distance. The reason is that researchers They believed That the satellite ionosphere, an electrically and located conductive region located in the highest layers of Calisto’s atmosphere, could be “imitating” the magnetic footprint that would emit a hypothetical salt and conductive water ocean. That is, astronomers could not know if the magnetism detected proceeded from outside or inside the moon. A new look. New data and analysis tools have allowed to solve this issue. The team responsible for the new study incorporated the set of measurements Magnetic available from the eight occasions in which the Galileo probe survived Callisto. Combining methods. The team combined the analysis of the data obtained by Galileo with a model that simulated Calisto’s ionosphere. They compared the results of the observations with what the suggested in the theoretical model. From the results obtained, the team responsible for the study concludes that the satellite ionosphere cannot by itself explain the magnetism detected, but that the existence of a salt water ocean under the surface of the moon could contribute to the observations. The results therefore suggest the existence of such an ocean. The details of the analysis and its results have been published In an article In the magazine AG ADVANCES. The oceanic worlds of our solar system. Calisto is just one more in The list of candidates To oceanic worlds in our solar system, a list that includes different bodies in which we believe, with greater or lesser degree of certainty, that there are oceans. This list includes other moons such as Europe, Ganymedes, Lord it, Triton, and also a dwarf planet: Pluto. These planets are of great interest to astrobiology since they are the main candidates to house life or the appropriate conditions for the emergence of this in our space neighborhood. That is why a whole new generation of probes is focused on The study of this type of environments. The list includes NASA’s Europe Clipper Mission, and Juice (JUPITER ICY MOONS EXPLORER) of the European Space Agency. The first will be focused on analyzing in depth the moon Europe while the European mission will travel to several of these frozen worlds to collect information about what their layers of ice hide. To these missions, China Tianwen-4 could be added, whose observations could also give us important data about Calisto and his hidden ocean. In Xataka | Juno has just given us an image we had never seen: lava rivers in a Jupiter satellite Image | NASA/JPL/DLR

Scientists discovered two objects in our galaxy that they are not able to explain

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Japanese astronomers have found two objects in our galaxy that defy all known logic. Although they are the size of typical stars, these bodies are predominantly composed of ice, a feature that does not fit current models of star formation. The discovery has surprised the scientific community, as it raises questions about its origin and if it really They could represent a completely new type of starnever before observed. These objects They have unusual characteristics that make their classification difficult.. Its size is comparable to that of white dwarfs or neutron stars, but its icy composition contradicts any previously documented phenomenon. Some researchers suggest they could have formed in extremely cold regions of spacewhere conditions allowed ice to accumulate on a massive scale. Others consider the possibility that they are remnants of ancient star systems that underwent radical transformations. A new type of star? The discovery of these icy bodies has given rise to an exciting hypothesis: are we facing a new type of star? Conventional stars, whether made of hydrogen, helium or denser compounds, do not have ice as a dominant component. This phenomenon suggests that there must be unknown cosmological processes that allow the formation of these objects. Astronomers still don’t have definitive answers, but They plan to use advanced telescopes to analyze its composition in depth and behavior. Spectroscopy could reveal key information about the presence of other elements and the temperature of these structures. On the other hand, scientists believe that understanding the galactic environment in which these bodies were found could also offer crucial clues. The discovery not only represents a challenge to current theories, but also a opportunity to expand our understanding of the universe. If it is confirmed that these objects are a new type of star, it will be necessary to rethink the foundations of modern astrophysics, opening the door to future research and possibilities in the exploration of the cosmos. Keep reading:• NASA managed to capture live the moment a planet disintegrated• NASA discovers new evidence of the presence of water on Mars• NASA astronauts have been “stranded” in space for 6 months

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