Cosmic bodies of the Solar system

The universe consists of a huge number of cosmic bodies. Every night, we can behold the stars in the sky, which seem very small, although it is not. In fact, some of them are many times larger than the Sun. It is assumed that near each lone star a planetary system is formed. So, for example, near the Sun formed the solar system, consisting of eight large, as well as small and dwarf planets, comets, black holes, cosmic dust, etc.

Earth is a cosmic body, because it is a planet, a spherical object that reflects sunlight. The seven other planets are also visible to us only because they reflect the light of the star. In addition to Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto, which until 2006 was also considered a planet, the Solar System also contains a large number of asteroids, also called small planets. Their number reaches 400 thousand, but many scholars agree that there are more than a billion of them.

Comets are also cosmic bodies moving along elongated trajectories and approaching the Sun at a certain time. They consist of gas, plasma and dust; Getting ice, reach a size of tens of kilometers. Approaching the star, the comets gradually melt. From high temperatures, the ice evaporates, forming a head and tail, reaching astounding dimensions.

Asteroids are the cosmic bodies of the Solar System, called still small planets. Their main part is concentrated between Mars and Jupiter. They consist of iron and stone and are divided into two types: light and dark. The first of them is lighter, the latter is heavier. Asteroids are irregular in shape. It is assumed that they were formed from the remnants of cosmic matter after the formation of the main planets, or they are fragments of a planet located between Mars and Jupiter.

Some cosmic bodies reach the Earth, but, passing through the thick layers of the atmosphere, they rub with friction and break into small parts. Therefore relatively small meteorites fell on our planet. The phenomenon is - not uncommon, the fragments of asteroids are stored in many museums around the world, they were found in 3500 places.

In space there are not only large objects, but also tiny ones. For example, meteoroids are called bodies up to 10 m in size. Space dust is even smaller, up to 100 μm in size. It appears in the atmospheres of stars as a result of emissions of gases or explosions. Not all cosmic bodies are studied by scientists. These include the black holes that exist in almost every galaxy. They can not be seen, they can only determine their location. Black holes have a very strong attraction, so they do not even let go of the light. They annually absorb huge amounts of hot gas.

Cosmic bodies have different shapes, sizes, location in relation to the Sun. Some of them are grouped together to make them easier to classify. For example, asteroids located between the Kuiper belt and Jupiter are called Centauri. Between the Sun and Mercury, Vulcanoid is supposed to be located, although no objects have been found yet.