Comet often appears to us as a star with a huge tail of fire. But few people know that this tail, it becomes only, when approaching the Sun. Because it is a heavenly body, heating the ice particles that make up the comet makes the fire produced gas and dust.
As already mentioned, the comet is a large lump of rocks, mixed with snow. Jokingly astronomers call them “dirty snowballs” because of their similarity. Actually ice, which is part of any comet, it is nothing like the frozen gas. To solve the mystery of the origin of the Solar system, several spacecraft have been sent to these heavenly bodies, to collect samples of the substance from which they are composed. After all, many scientists believe that comets were formed from the matter early, even before the appearance of the Solar system.
Also there is a theory that the Sun is his second, invisible part of man that attracts comets. After they all gather together, their weight overcomes the force of attraction of the Sun and the movement continues. This, of course, all comets burn. Hence the phenomenon of a meteor shower. This theory may explain the total disappearance of all comets occurring once in 100 million years. Continue reading
Solar system — the planetary system that includes a Central star — the Sun — and all the natural space objects orbiting the Sun. It was formed by gravitational contraction of the dust cloud around is 4.57 billion years ago. Note: the sun is not a planet.
Planets of the solar system in order:
Click on the button above. to start an interactive 3D map of the planets of the solar system (opens in new window)
Pluto is the decision of the MAC (international Astronomical Union) no longer applies to the planets of the Solar system, and is a dwarf planet and even inferior in diameter another dwarf planet Eris. Designation 134340 Pluto.
Scientists have put forward many versions of the origin of our Solar system. In the forties of the last century Otto Schmidt put forward the hypothesis that the Solar system arose because the cold dust cloud attracted by the Sun. Over time the cloud formed the foundations for future planets. In modern science it is theory that Schmidt is the principal. Continue reading
The diversity of comets in the Solar system
The comet (from al-Greek. hairy, shaggy) – a small celestial body having a foggy view, orbiting the Sun in conic section with a very extended orbit. When approaching the Sun, the comet forms a coma and sometimes a tail of gas and dust.
Comets are placed into circulation periods:
At this time, found more than 400 short-period comets. Of these, about 200 were observed in more than one perihelion passage. Short-period comets (period less than 200 years) come from the region of the outer planets, moving in the forward direction for orbits lying close to the Ecliptic. Away from the Sun, comets usually do not have “tails”, but sometimes have a barely visible “to”, surrounding the core; together they are called the “head” of the comet. Approaching the Sun the head is increased and there is a tail. Many of them belong to so called family. For example, most of the short-period comets (full rotation around the Sun lasts 3-10 years) form the family of Jupiter. A little smaller of a family of Saturn, Uranus and Neptune (the latter, in particular, is the famous comet Halley). Continue reading