Under the hot topic of “scientists found that Venus has the possibility of life”, some netizens commented in this way. Searching for extraterrestrial life is a matter that researchers all over the world have been striving for; and finding extraterrestrial life is what many people hope to see, and more people are worried about.
a recent development: a team of scientists from the Massachusetts Institute of Technology, the University of Manchester and the Cardiff University in the United States, with the help of the Maxwell telescope (JCMT) in Hawaii and ALMA in the northern desert of Chile The telescope has found the biological marker phosphine (PH3) twice in the atmosphere of Venus, so the possibility of life signs on Venus cannot be ruled out. < / P > < p > there is no doubt that Venus may exist, and life is just like the Arabian Nights. Many media described the discovery as “highly reliable, but not fully confirmed.”. Although Venus is the closest planet to the earth, human exploration of extraterrestrial life always focuses on the moon, Mars and even exoplanets. The reason is that its living environment is so bad that it doesn’t seem like a place where life should exist: < / P > < p > last month, a team of scientists from NASA’s Goddard Institute for Space Research (GISs) wrote in the well-known academic journal Journal of geophysical research In the framework of the evolution of Venus, it explains how Venus evolved into today’s purgatory step by step. < p > < p > in the acidic atmosphere of Venus, phosphorus should exist in the form of oxides. However, the presence of phosphine (PH3) has been detected in the atmosphere of Venus through the single line millimeter wave band spectra of Maxwell and Alma telescopes. < / P > < p > in chronological order, the scientists first observed Venus for five consecutive mornings using the Maxwell Telescope (the largest single aperture telescope in the world working in submillimeter band) in June 2017. The existence of phosphine was found for the first time by analyzing the spectral signal. < / P > < p > to confirm this discovery, scientists conducted another observation through the Alma telescope in March 2019. It is worth mentioning that the accuracy of Alma telescope is 10 times higher than that of Hubble Space Telescope, and it has higher signal-to-noise ratio, that is to say, the more useful components and less interference components are received. < / P > < p > combined with the two data, scientists estimated that the concentration of phosphine in the atmosphere of Venus is about 20 ppb (two parts per billion), which is 10-1 million times of the concentration of phosphine in the earth’s atmosphere, which is very abnormal for Venus. According to the information that has been mastered by human beings, there is no phosphine produced in the atmosphere, cloud layer, surface and underground of Venus, nor can lightning, volcano and meteor produce phosphine. In addition, scientists have also established a model to take into account factors such as volcanic eruption, lightning and meteor, and the calculated phosphine concentration is four orders of magnitude lower than the actual detection value. < / P > < p > the second explanation is worth mentioning and widely concerned. Scientists speculate that phosphine on the earth is produced by life, so Venus, as the earth’s nearest neighbor, may also have produced phosphine through biological means. In fact, phosphine is a colorless, highly toxic and flammable gas, which needs to be stored in a cylinder for liquefaction and compression. The gas often smells of garlic or rotten fish. The reason why phosphine is produced by life is that the gas is not easy to produce in general, but is generated in the following two ways: < / P > < p > in terms of future research direction, the scientists mentioned in the paper that we should look for other spectral characteristics of phosphine, and also check the source of gas by sampling. It is hoped that the scientific community will strictly review our research methods and conclusions. I believe our models and data work well, but I’m still skeptical. If possible, I hope the world can point out our mistakes. < / P > < p > even if the research team itself is skeptical, it is undeniable that humans have always been curious about extraterrestrial life. NASA director Jim bridenstine tweeted: “does Venus have life? The discovery of phosphine, a byproduct of anaerobic organisms, is an important step in the search for extraterrestrial life. About 10 years ago, NASA found signs of microbial life 120000 feet above Earth’s upper atmosphere. Now it’s time to give priority to Venus. In the same year, Carl Sagan, a famous American astronomer, established the Venus atmospheric greenhouse model, revealing the secret of Venus’ high temperature. He devoted himself to searching for extraterrestrial life and left a famous saying: < A= https://ibmwl.com/category/global-tech/ target=_ blank>Global Tech