The planets
• The planets turn about the Sun. They do not have proper light, but they reflect the solar light.
• The planets have diverse movements. The most important are two: that of rotation and that of movement. For that of rotation, they turn on yes same about the axis. Ésto determines the duration of the day of the planet. For that of movement, the planets describe orbits about the Sun. Every orbit is the year of the planet. Every planet takes a different time to complete it. Further,more time. They turn almost in the same plane, except Pluto, which has the most sloping, eccentric and elongated orbit.
• Form and size of the planets
• The planets take almost spherical form an as as a ball a little smoothed by the poles.
• The compact materials are in the nucleus. The gases, if there is, form an ambience on the surface. Mercury, Venus, the Earth, Mars and Pluto are small and rocky planets, with high thickness. They have a slow movement of rotation, few lunas (or none) and quite round form. Júpiter, Saturn, Uranus and Neptune, the gaseous giants, are enormous and light, a gas facts and ice. These planets turn quickly and have many satellites, more equatorial abultamiento and rings.
• The planets formed approximately 4.500 million years ago, at the same time that the Sun.
• In general, the light materials that did not remain in the Sun moved away more than the heavy ones. In the gas cloud and original dust, which was turning in spirals, there were denser zones, projects of planets. The gravity and the collisions took more matter to these zones and the rotary movement rounded them Later, the materials and the forces of every planet were readjusting, and they still do it. The planets and the whole Solar System keep on changing aspect. Without hurry, but without break.
Mercury
It is the planet of the Solar System most next to the Sun, and the smallest (with the exception of the dwarf planets). It is a part of the so called interior or rocky planets. Mercury has no satellites. Very little was known on his surface until there was sent the planetary probe Mariner 10, and remarks did with radars and radio-telescopes.Formerly it was thought that Mercury was always presenting the same one facing the Sun, situation similar to the case of the Moon with the Earth; that is to say, that his period of rotation was equal to his period of movement, both of 88 days. Nevertheless, in 1965 they got about by pulses of radar towards Mercury, with which he remained definitively demonstrated that his period of rotation was 58,7 days, which is 2/3 of his period of movement. This is not a coincidence, and it is a situation so called orbital resonance.
• The planets have diverse movements. The most important are two: that of rotation and that of movement. For that of rotation, they turn on yes same about the axis. Ésto determines the duration of the day of the planet. For that of movement, the planets describe orbits about the Sun. Every orbit is the year of the planet. Every planet takes a different time to complete it. Further,more time. They turn almost in the same plane, except Pluto, which has the most sloping, eccentric and elongated orbit.
• Form and size of the planets
• The planets take almost spherical form an as as a ball a little smoothed by the poles.
• The compact materials are in the nucleus. The gases, if there is, form an ambience on the surface. Mercury, Venus, the Earth, Mars and Pluto are small and rocky planets, with high thickness. They have a slow movement of rotation, few lunas (or none) and quite round form. Júpiter, Saturn, Uranus and Neptune, the gaseous giants, are enormous and light, a gas facts and ice. These planets turn quickly and have many satellites, more equatorial abultamiento and rings.
• The planets formed approximately 4.500 million years ago, at the same time that the Sun.
• In general, the light materials that did not remain in the Sun moved away more than the heavy ones. In the gas cloud and original dust, which was turning in spirals, there were denser zones, projects of planets. The gravity and the collisions took more matter to these zones and the rotary movement rounded them Later, the materials and the forces of every planet were readjusting, and they still do it. The planets and the whole Solar System keep on changing aspect. Without hurry, but without break.
Mercury It is the planet of the Solar System most next to the Sun, and the smallest (with the exception of the dwarf planets). It is a part of the so called interior or rocky planets. Mercury has no satellites. Very little was known on his surface until there was sent the planetary probe Mariner 10, and remarks did with radars and radio-telescopes.Formerly it was thought that Mercury was always presenting the same one facing the Sun, situation similar to the case of the Moon with the Earth; that is to say, that his period of rotation was equal to his period of movement, both of 88 days. Nevertheless, in 1965 they got about by pulses of radar towards Mercury, with which he remained definitively demonstrated that his period of rotation was 58,7 days, which is 2/3 of his period of movement. This is not a coincidence, and it is a situation so called orbital resonance.
Venus 
It is the second planet of the Solar System in order of distance from the Sun, and the third one as for size (of minor to major). It receives his name in honor to Venus, the Roman goddess of the love. It is a question of a planet of terrestrial or telluric type, called often the planet brother of the Earth, since both are similar as for size, mass and composition. The orbit of Venus is an ellipse with an eccentricity of less than 1 %, practically a circumference
•On having been Venus nearer to the Sun that the Earth, it is always possible to find, approximately, in the same direction of the Sun (his biggest elongation is of 47,8th), from what from the Earth it is possible to see only a few hours before other or after the west. In spite of it, when Venus is more brilliant it can be seen during the day, being one of three only celestial bodies that can be seen so much in the daytime as at night (others are the Moon and the Sun). Venus is normally an acquaintance as the star of the morning (Star of Alba) or the star of the evening (Star Vespertino) and, when it is visible in the night sky, is the most brilliant object of the firmament, apart from the Moon.
The Earth
it is the third planet of the Solar System (counting in order of distance of eight planets to the Sun), and the quarter of them of minor to major. It is placed to some 150millones of kilometers of the Sun. It is the only planet in which the existence of life is known. The Earth formed at the same time that the Sun and the rest of the Solar System, it does some 4570millones of years. The volume of the Earth is more than one minor million times that the Sun and the mass of the Earth is nine times major than that of his satellite, the Moon. The average temperature of the terrestrial surface is approximately 15 °C. In his origin, the Earth could have been only an aggregation of incandescent rocks and gases.
Mars
It is the fourth planet of the solar system. Acquaintance as the red planet for his pink tones, the Romans were identifying it with the blood and they put the name of his god of the war.• The planet Mars has a very thin ambience, formed principally by carbon dioxide, which freezes alternativamente in each of the poles. It contains only 0,03 % of water, thousand times less than the Earth.• The studies demonstrate that Mars had a more compact ambience, with clouds and precipitations that were forming rivers. On the surface adivinan ruts, islands and coasts.
jupiter
it is the fifth planet of the Solar System. It is a part of the so called exterior or gaseous planets. It receives his name of the Roman god Júpiter (Zeus in the Greek mythology).• it is a question of the planet that offers a major sheen throughout the year depending on his phase. It is, also, after the Sun the biggest celestial body of the Solar System, with a mass almost two times and average that of other together planets (318 times heavier than the Earth and 3 times more than Saturn).• Júpiter is a massive gaseous body, formed principally by hydrogen and helium lacking in an interior definite surface. Between the atmospheric details there stand out the Big red spot, an enormous anticyclone placed in the tropical latitudes of the south hemisphere, the structure of clouds in bands and zones, and the strong dynamics of zonal winds with speeds of up to 140 m/s (504 km/h).
It is the second planet of the Solar System in order of distance from the Sun, and the third one as for size (of minor to major). It receives his name in honor to Venus, the Roman goddess of the love. It is a question of a planet of terrestrial or telluric type, called often the planet brother of the Earth, since both are similar as for size, mass and composition. The orbit of Venus is an ellipse with an eccentricity of less than 1 %, practically a circumference
•On having been Venus nearer to the Sun that the Earth, it is always possible to find, approximately, in the same direction of the Sun (his biggest elongation is of 47,8th), from what from the Earth it is possible to see only a few hours before other or after the west. In spite of it, when Venus is more brilliant it can be seen during the day, being one of three only celestial bodies that can be seen so much in the daytime as at night (others are the Moon and the Sun). Venus is normally an acquaintance as the star of the morning (Star of Alba) or the star of the evening (Star Vespertino) and, when it is visible in the night sky, is the most brilliant object of the firmament, apart from the Moon.
The Earth
it is the third planet of the Solar System (counting in order of distance of eight planets to the Sun), and the quarter of them of minor to major. It is placed to some 150millones of kilometers of the Sun. It is the only planet in which the existence of life is known. The Earth formed at the same time that the Sun and the rest of the Solar System, it does some 4570millones of years. The volume of the Earth is more than one minor million times that the Sun and the mass of the Earth is nine times major than that of his satellite, the Moon. The average temperature of the terrestrial surface is approximately 15 °C. In his origin, the Earth could have been only an aggregation of incandescent rocks and gases.
MarsIt is the fourth planet of the solar system. Acquaintance as the red planet for his pink tones, the Romans were identifying it with the blood and they put the name of his god of the war.• The planet Mars has a very thin ambience, formed principally by carbon dioxide, which freezes alternativamente in each of the poles. It contains only 0,03 % of water, thousand times less than the Earth.• The studies demonstrate that Mars had a more compact ambience, with clouds and precipitations that were forming rivers. On the surface adivinan ruts, islands and coasts.
jupiterit is the fifth planet of the Solar System. It is a part of the so called exterior or gaseous planets. It receives his name of the Roman god Júpiter (Zeus in the Greek mythology).• it is a question of the planet that offers a major sheen throughout the year depending on his phase. It is, also, after the Sun the biggest celestial body of the Solar System, with a mass almost two times and average that of other together planets (318 times heavier than the Earth and 3 times more than Saturn).• Júpiter is a massive gaseous body, formed principally by hydrogen and helium lacking in an interior definite surface. Between the atmospheric details there stand out the Big red spot, an enormous anticyclone placed in the tropical latitudes of the south hemisphere, the structure of clouds in bands and zones, and the strong dynamics of zonal winds with speeds of up to 140 m/s (504 km/h).
Saturn it is the sixth planet of the Solar System, it is the second one in size and mass after Júpiter and it is the only one with a visible system of rings from our planet. His name comes from the Roman god Saturn. It is a part of the so called exterior or gaseous planets, also called jovianos for his similar one to Júpiter. His brilliant rings are the aspect most typical of Saturn. Before the invention of the telescope, Saturn was the most distant of the well-known planets and, a simple sight, it seemed neither luminous nor interesting. The first one in observing the rings was Galilean in 1610 but the low inclination of the rings and the low resolution of his telescope made be thought by them about a beginning that was talking each other about big lunas. Christiaan Huygens with better means of observation could in 1659 observe with clarity the rings. James Clerk Maxwell in 1859 demonstrated mathematically that the rings could not be the only solid object but they had to be the grouping of millions of particle of minor size.
Uranus it is the seventh planet of the Solar System, the third one in size, and the most massive quarter. The principal characteristic of Uranus is the inclination of his axis of rotation of almost ninety grades with regard to his orbit; the inclination not only limits itself to the same planet, but also to his rings, satellites and the magnetic field of the same one. Uranus possesses the most uniform surface of all the planets for his blue - greenish characteristic color produced by the combination of present gases in his ambience and has a system of rings that cannot be observed to simple sight. Also it possesses a blue ring, which is a planetary oddness. Uranus is one of two planets that has a retrograde movement, similar to that of Venus.
Neptuneit is the eighth and last planet of the Solar System. It is a part of the so called exterior planets or gaseous giants, and is the first one that was discovered thanks to mathematical prophecies. His name comes from the Roman god Neptune, the god of the sea.• After the discovery of Uranus, it was observed that the orbits of Uranus, Saturn and Júpiter were not behaving as there were predicting the laws of Kepler and of Newton. Adams and Verrier, of independent form, calculated the position of another planet, Neptune, which found Galle, September 23, 1846, at least of a grade of the position calculated by Adams and Him Verrier. Later, it was warned that Galilean he had already observed Neptune in 1611, but it had taken it as a star.• Neptune is a dynamic planet, with spots that remember the storms of Júpiter. The biggest, the Big Dark Spot, had a size similar to that of the Earth, but in 1994 it disappeared and other one has formed. The strongest winds of any planet of the Solar System are those of Neptune.
Sedna 
•: The ninth planet of the Solar System?
• Sedna turns about the Sun at a distance much major than other stars of the system.
• Although his size is still uncertain, Sedna is the biggest of the planets located about the Sun from the discovery of Pluto in 1930. It is to more than 10,000 million kilometers of the Earth in a region called Belt of Kuiper, which has hundreds of well-known objects, small worlds of rock and ice, although some of them can be so or bigger than Pluto. Sedna is redder than any other body of the Solar System, except Mars, and it continues a very elliptical orbit, which in his most remote point places him to 135,000 million kilometers of the Sun. For it, Sedna needs 11,500 terrestrial years to complete an orbit.
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