The vast and immense Universe has already accustomed us to observe celestial bodies almost spherical but spherical in an imperfect form. Finding something geometrically perfect in the Universe would be absolutely rare.
If you think otherwise, planets and stars are not perfect spheres, the centrifugal forces to which these bodies are subjected, cause them to be “crushed” at the poles. The planet Earth, by itself, is a good example of this fact, however, there is a celestial body that seems to be challenging the laws of physics.
It is located 5000 light years from planet Earth and was called Kepler 11,145,123 (or KIC 11145123). Its sphere seems to defy the laws of physics, because it seems to be the most spherical object ever found in space.
Astronomers are being cautious, but they are also amazed at what they discovered in the cosmos. It is such a spherical body, so geometrically perfect, that researchers at the Max Planck Institute for the Solar System and the University of Gottingen in Germany are intrigued and now want to realize more about what causes this object to be alien to the conditions of space.
“Kepler 11145123 is the most spherical natural object ever measured, it is much rounder than the Sun,” said astronomer Laurent Gizon, leader of the study.
To reach this conclusion, the researchers used a technique known as seismology, or stellar asterism, which studies the internal structure of stars and determines the sphericity of objects.
When rotating on their axis, the moons, planets and stars are subjected to centrifugal forces that flatten their poles, and our Sun has a 27-day rotation cycle and the radius of its circumference is 10 kilometers, larger in its line of the Ecuador than in the poles. In the case of the Earth, this difference is 21 kilometers.
Already KIC 11145123, presents a difference of only 3 kilometers, small, if it is considered that this star has a radius of 1.5 million kilometers, twice as much as the Sun.
Although the experts do not have a conclusive answer on the reason of this phenomenon, some assumptions were made:
“The rotation of this star is surprisingly slower, three times slower than the Sun, and we do not know exactly why,” he said. “But by turning slower, it deforms less,” Gizon told the BBC.
In addition, its center rotates more slowly than its outer layers.
The specialist said that rotation is not however, the only factor that determines the shape of a star, there is also the magnetic field.
“We realized that this star appeared to be a bit more rounded than anticipated its rotation,” “That is why we also attribute its shape to the presence of the magnetic field,” he added.
Astronomers have also suggested that their weak magnetic field (much weaker than the Sun) is one of the possible explanations for their sphericity. These data can be read in the journal Science Advances.
According to the group of researchers, this work is a first step in the study of stellar forms with asterism.