An international team of astronomers, led by the University’s scientists, wrote in the latest issue of nature astronomy that they had discovered a new planet, the super hot Neptune, LTT 9779b. The researchers pointed out that previous models suggested that such planets could not exist, so further analysis of them would help to understand the formation and evolution of planets. The revolution period of ltt9779b is only 19 hours. Due to its close proximity to the star, the radiation from the star heats the planet to above 1700 ℃. The preliminary observation data provided by the extraterrestrial planet survey satellite indicate the existence of ltt9779b. Then, scientists confirmed its existence with the help of data provided by the “high precision radial velocity Planet Finder”. < / P > < p > ltt9779b’s “weight” is twice that of Neptune (Neptune’s mass is about 17 times the mass of the earth), but its “bulk” is only slightly larger than Neptune, and its density is similar. Therefore, scientists infer that the mass of the core of ltt9779b should be 28 times the mass of the earth, and the mass of its atmosphere accounts for about 9% of the total mass of the planet. < / P > < p > research shows that ltt9779b is now located in the “Neptune desert” – an area where Neptune size planets are not expected to survive. The model points out that when planets such as ltt9779b move close to the stars, the light evaporation process will cause the atmosphere to be stripped. Large gas giant planets, on the other hand, have strong gravitational fields that can maintain their atmosphere. As a result, there is a lack of Neptune like planets with very short orbital periods in this region. Now scientists have found such objects for the first time in this region. < / P > < p > scientists further explained that ltt9779b may have been a gas giant planet at the time of its birth. Due to its close proximity to the star, the star’s gravity is stronger, which “grabs” the outer layer of the planet to the star, resulting in a significant reduction in the mass of the planet. Another possibility is that ltt9779b is not where it was born. It is only after it that it reaches its current orbit, and the star has no time to strip its atmosphere. In addition, collisions with other planets in the system may also cause them to be close to the stars. “Ltt9779b is the first such planet to appear,” said Dr. ed Gillen of the Cavendish Laboratory at Cambridge University, co-author of the research paper. Why is the orbital period of this planet so short? Why does it still have an atmosphere? It’s all questions we need to answer. We are lucky to have a more detailed understanding of the formation of planets in the near future Global Tech

By ibmwl