Scientists studying exoplanets orbit the planet also moved (video) www.274300.cn

Scientists studying exoplanets orbit transfer mystery earth like planets also move to explore outer space planetary scientists found that at the age of 10 million years following the stars near the orbit of planets, whether terrestrial planets or giant planets like Jupiter, may not have enough time to go through the process of space Tencent slow news according to foreign media reports, many known extrasolar planets orbit very close to their ruler, orbital radius of less than 1/10 astronomical units (one astronomical unit is equal to the average distance on the ground). So their orbital period is very short, and the effect of gravity on their relatively large swing ruler. It also makes these planets can easily be detected and the speed of Xingfa ling. But astronomers don’t know is that these planets are located near the star from the original material formation, or local evolution outside an astronomical unit after the formation, gradually move to close to the planet orbit. There is no doubt that planets can migrate, as well as the evidence for computer simulation of planetary migration and observed planetary characteristics. If the planets do migrate, there are three mechanisms that could cause them to migrate. These three mechanisms are related to each other, migration of the planet by the protoplanetary disk galaxy in celestial action, the companion (like a binary system that is) or influence while planets migrate. However, it is still unclear whether any of these three mechanisms is the real reason. Since each mechanism is constrained by a set of conditions, it is possible to discriminate them using different time scales. For example, the simulation shows that the planetary migration caused by another celestial body is significantly slower than that caused by the planetary disk. Therefore, the scientists found that at the age of 10 million years following the stars near the orbit of planets, whether terrestrial planets or giant planets like Jupiter, may not have enough time to go through the slow process, such as planetary planetary interaction or planet star interaction from an astronomical unit outside the orbit of migrating. The Harvard Smithsonian Center for Astrophysics astronomer Elisabeth Newton, Jonathan Irwin, David Charbonneau and Andrew Vanderburg and their colleagues studied the planet K2-33b. The planet is a size larger than Neptune, surrounded by a very young (only 11 million years) the motion of the star 5.04 earth radius the radius of the orbit, the orbital period of 5.425 days. Prior to this, the team had ruled out a number of other possibilities (such as star spots) that led to the star’s light beyond the stars, thus confirming the presence of planets. Because the star is too young, the team believes that the planets are either in place or in a very short period of time due to the interaction with the disk. But the planet is not likely to be formed at a distance, and affected by the other two mechanisms. For accurate interpretation of transit data need to know the mass and radius of the star, the astronomers were carefully built)相关的主题文章: