The Oort Cloud and the Kuiper Belt are the boundary bodies of the Solar System

The Oort cloud is a hypothetical belt aroundThe solar system is filled with asteroids and comets. To date, no telescope has yet been able to detect such small objects at a considerable distance, but many indirect evidence indicate that there is a similar education at the far reaches of our stellar system. At the same time, the Kuiper belt and the Oort cloud should not be confused. The first is also similar to the asteroid belt and includes many

small subjects. It was discovered relatively recently, in the 2000s, when it was discovered that behind the Sun the orbiting bodies rotate around the Sun, some of them even larger than the ninth planet, but not all of them had a clear and cleared orbit, constantly shifting in their trajectory under the influence of each other. A dilemma arose: on the one hand, they could hardly be called planets, but on the other hand, they are larger in size than Pluto. Then for the first time in history, modern scientists have created a clear list of criteria that the heavenly body must meet in order to carry the status of the planet. As a result, Pluto lost this status. In recent years, scientists have discovered dozens of objects in the Kuiper belt. The largest of them are Eris and Sedna.

And what is the Oort Cloud?

If the Kuiper belt objects are completely accessiblemodern telescopes, then the bodies of this cloud are separated from the sun for a whole light year. It is rather difficult to consider them directly at telescopes at such a distance. At the same time, astrophysicists have already discovered dozens of planets even in other stellar systems, but, firstly, they are almost all giant planets like Jupiter, and secondly, they are observed not by themselves, but by gravitational influence on their star. However, the cloud Oort literally sends us a lot of evidence of its existence. It's about comets, which come to the solar system with constant frequency, being messengers of this sphere. Perhaps the most famous example is Halley's comet. The Oort cloud was named after the Dutch astrophysicist, who predicted his discovery in the middle of the 20th century, based on the observation of long-period comets. This sphere, as well as the Kuiper belt, consists of trans-Neptunian objects, which in turn consist mainly of ice, as well as methane, carbon monoxide, cyanide, ethane and other substances. It is very likely that stone objects can rotate there.

Origin of the sphere

Modern astrophysicists believe that the Kuiperbelt, Oort cloud - this is what is left of the substances that formed the solar system, but not included in any of the planets. About five billion years ago, most of the matter of the exploding star of the first generation (that is, formed relatively soon after the Big Bang) due to gravity and millions of years of condensation transformed into a new star - the Sun. A small part of this protoplanetary rotating disk gathered into huge blocks and formed the planets of our system. The rest of the dust and small objects of the nebula were thrown to the very edge of the solar system, forming the Kuiper belt and the very far sphere of the Oort cloud.

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