Comet Churyumov-Gerasimenko are two comets stuck together
The researchers of the mission “Rosetta” said the comet 67/P Churyumov-Gerasimenko acquired its form as a result of collision at a low speed of two different comets in the early development of the Solar system.
A team of researchers under the leadership of astrophysics Massironi Matteo (Matteo Massironi) from the University of Padova (Italy) look at the Photos of the comet 67P/Churyumov-Gerasimenko, taken in high resolution in the period between 6 August 2014 and 17 March 2015, it Became evident that the comet was formed as a result of collision of two different bodies, flying at low speed. The results of the ESA study says .
Recall, the first images of the comet from close range, the probe “Rosetta” in July 2014 showed that the object consists of two “blocks” of different sizes. and resembles the shape of a rubber duck. Scientists examined two hypotheses: the first is that the cosmic body had acquired such an unusual form as a result of a collision between two comets, and another stated that the “neck” of the comet formed in the process of natural erosion of rocks that make up the object. Now, however, the researchers got convincing evidence in favor of the first.
According to Matteo Massironi, looking closely at the pictures, it becomes clear that the outer shell of the blocks that make up the comet, has a different structure, which,according to the researchers, extends several hundred meters deep (650 m in some places). “You can imagine the layering material like the structure of onion. Only in this case we have two different “bulbs” formed separately prior to their fusion into a single entity,” explained the researcher.
In the study, researchers first identified more than a hundred steps on the surface of the comet and parallel layers of material that are clearly visible on the ground, opening craggy rocks and pits. After that, they were able to do three-dimensional modeling, which helped to determine the angle and direction in which blocks forming the comet were tilted, and how they work inside.
Scientists also drew attention to the local gravity and orientation of the individual layers over the entire surface of the reconstructed model of the comet. The idea is that layers of matter in outer body should be formed at right angles to the line joining them with the center of gravity. Scientists have constructed two different models of the comet: one with the center of gravity closer to the “neck” and the other with separate centers of gravity in each block. They found that the data favor the second model.
Portal Scientific Federation monitors the development of the mission “Rosetta” on the study of comets in the Solar system in close proximity. Previously we wrote about the fact that the comet Churyumov-Gerasimenko has virtually no magnetic field. and its surface is speckled with tiny “eggs of dinosaurs”.