Planets form into slices of gas and dust surrounding young stars that have just emerged. Such a protoplanetary disk and its central star rotate together around one and the same axis, which is perpendicular to the disk. Accordingly, the astronomers assumed that the planets in the disk also run around the star in the disk plane? in the same direction as the star. This is indeed the case with the planets in our solar system, but not with some of the Hot Jupiter. These planets, first discovered 15 years ago, have a mass at least as large as that of Jupiter, the largest planet in our solar system. Previously, it was assumed that the Hot Jupiter would rise far from their star and then move toward it until they reach their final orbit? a migration caused by gravitational interactions with the dust disk. Also, the orbit of the hot Jupiter would have to align itself so along the direction of rotation of the star around itself.
The scientists are now considering an alternative mechanism: Considered a process lasting several hundred million years, in which a kind of tug-of-war with distant planets or companion stars of the parent star takes place. After such disturbances have steered a large exoplanet onto an inclined and elongated orbit, would it lose energy every time it encounters the star? and finally, the new Hot Jupiter would end up near the star on an orbital, but arbitrarily inclined orbit, opposite the main plane of the planetary system.Andrew Cameron (University of St Andrews) et al: Lecture at the National Astronomy Meeting ddp / science.de? Rochus Rademacher advertisement