Notícia

Vaaju

Scientists identify asteroids of interstellar origin moving in our solar system

Publicado em 21 julho 2020

Researchers at São Paulo State University’s Institute of Geosciences and Exact Sciences (IGCE-UNESP) in Rio Claro, Brazil, have recently discovered 19 asteroids of interstellar origin. These asteroids are classified as Centaurs, which are external solar system objects orbiting the sun in the region between the orbits between Jupiter and Neptune.

The study entitled An Interstellar Origin of Centaurs with High Slope is supported by FAPESP and has been published in Royal Astronomical Society monthly announcements.

According to the study, when The solar system was formed 4.5 billion years ago in a star chamber, it included its planets and asteroids. Some starts were close enough to each other to facilitate strong gravitational interactions. Due to these interactions, there was an exchange of materials between the systems, reported.

“Some objects now in the solar system must therefore have formed around other stars. Until recently, however, we could not distinguish between captured interstellar objects and objects formed around the sun. The first identification was made by us in 2018, “says Maria Helena Moreira Morais, one of the two co-authors.

The first space rocket discovered by scientists was the asteroid 514107 Ka’epaoka’awela. The name of the asteroid is Hawaiian and loosely translates to “joke opposite concerning companions to Jupiter”.

The study reveals that the Centaurs have very sloping orbits with respect to the planet’s orbit. It also revealed that space rocks and planets that formed in the solar system were produced from a thin disk of gas and dust that orbited the sun.

According to researchers, celestial bodies and objects formed in the solar system touched the plane of the disk 4.5 billion years ago. If this were the case, it would have been true for Centaurs.

“But our simulation showed that 4.5 billion years ago, these objects orbited the sun in orbits perpendicular to the plane of the disk. In addition, they did so in an area far from the gravitational effects of the original disk,” Morais said.