Which planet is closer to the Sun, or Wings on sandals

About what planet is closer to the Sun, people learned in the most ancient centuries. True, there was an incident: the Greeks took it for two planets, because they saw twice a day from different sides of the Sun. When it was discovered that the planet was still one, the name was given to it the corresponding one - Mercury. It is the name of the Greek god of commerce, he is also bright, flying everywhere in his winged sandals.

Distinctive features

The Earth year lasts 365 days, and the Mercurian - only 88. But here too there is an interesting detail: around the Sun Mercury flies like a wind, and around the axis spins slowly. Therefore, for his, Mercury, two Earth years pass! Which planet is closer to the Sun, she receives from him the greatest love and warmth.

The surface of Mercury is quite hot: it will easily melt tin and lead without the help of a furnace. He himself, like an oven. However, this is not permanent. The temperature there "slightly" varies: from +350 in the afternoon to -170 at night (Celsius). Naturally, there is no atmosphere, and all of its hard surface is covered with craters. This is the smallest planet in our solar system, except for Pluto.

Origin

Astronomers believe that the universe occurred as a result of the Big Bang 17 billion years ago. The study of planets and even galaxies is impossible without considering the universe with all cosmic influences on it. It is infinite in time and space, its forms are infinitely diverse, matter is in constant development.

Everything that exists in the universe was formed from hydrogen and helium with insignificant inclusions of other elements. The Earth on which we live is the planet of the solar system that our galaxy has hosted - the Milky Way. This is a giant star system, you can just look at the sky to make sure: what is there, in the sky, brighter than the Milky Way? These are billions and billions of stars, far from the Earth at unimaginable distances. The solar system is the most common. The Milky Way encircles the entire celestial vault, it is a giant star system consisting of almost 200 billion stars, forming in the space of a rather complex figure - a thin disc with an apparent thickening in the center. And if you look at it from the side, it becomes like a spindle. At first, the galaxy was a slowly rotating gas cloud (tens of times present). Under the influence of its own gravity, the cloud collapsed, so that the centrifugal force and gas pressure could not withstand this. Thus, the first, strongest stars were born, which were launched along the radial motion of the gas toward the center, so the orbits elongated by this process have the shape of an ellipse.

The solar system is a big and friendly family, the interconnections of which were soldered by the forces of mutual attraction, in which there is a head, children, grandchildren, nephews and constantly visiting guests: the Sun, planets with satellites, asteroids, dust, gas and various small particles. There are only nine planets. A few thousand asteroids. Comets are smaller, but there are countless meteoric bodies.

Planets Earth and Jupiter

We study large planets in two groups - terrestrial and Jovian. Mercury, Venus, Mars are closer to us. So there are four of us. The second group - giant planets - Jupiter, Saturn, Uranus and Neptune. Pluto did not enter the classification, according to its characteristics it is closer to the satellites of the giant planets. He's small. And then, which planet is closer to the Sun, is not Pluto the same? Why did the planets be divided into groups? Because they are different in physical properties. Just have to look again, which planet is closer to the Sun. The difference between these planetary groups is that the terrestrial was formed in the heat, and the giant planets are on the cold edge. The terrestrial group of planets is tiny, in comparison with Jovian, but they are more dense and consist of silicate and iron. And giant planets do without a solid surface, and live in a gas-liquid state. The atmosphere of the Jovian planets is there, it gradually thickens and transforms into a liquid mantle. The atmosphere is extraordinarily beautiful. But you can not breathe in it, and on the surface you will not walk.