Pluto

Number of satellites: 1 the most important, 2 very small discovered by the Hubble Space Telescope in 2006.

The story of Pluto, its discovery

For Adams and Le Verrier, Neptune was the solution. For generations of astronomers who followed would become a problem.

Neptune

Uranus be exposed in 1781 but as the years accepted, it became obvious that the planet did not move as probable. The judgment was causing the trouble caused by an unknown planet located at a greater distance. John Couch Adams in England estimated a situation for the new planet while Galle and diarist in France undertake the search based on the calculations of Le Verrier.

Neptune does not meet portend law of terrestrial distances and because it is the third most massive planet in the Solar System (Uranus is somewhat higher but its mass is less) this would indicate that the law is a new match.

Comet

Comets are unsteady body, which usually include little not many kilometers in distance. When you are at a great distance from the Sun are down, its small core, which can vary from a few hundred meters to about 10 km. only reflects light. Near the sun the core is surrounded by a "head", the comma, whose diameter can be up to 30,000 km. The coma is composed of gas emerged from the nucleus by sublimation and dust. Its production increases severely as we advance the Sun.

Uranus

From Earth the Uranus in study by a telescope. Within walking distance of the cloud tops and a pressure of 0.4 times that recorded on Earth at sea level the temperature is -214 ° C. The chemical composition of the uppermost layer of the atmosphere is mostly hydrogen gas while the bulk of Uranus is composed of heavy material. Uranus should be composed predominantly water ice, ammonia and methane compounds that because the most abundant elements (hydrogen, oxygen, carbon and nitrogen) are the usual ice in the solar system. Its south pole exposed to the sun for decades seemed stained with a reddish tinge; a series of concentric waves could be clearly seen in the images processed by the computer and handfuls high luminous clouds swept from east to west by winds of up to 500 km / hour.

The Saturn

This is the second biggest in our solar system and the only planet whose average mass does not exceed that of water so if there is a sea that surround Saturn could soar.

At Saturn from a modern telescope in 1610, Galileo draw it as a globe bounded by two smaller ones as a head with large ears (the first one who came up with the Mickey Mouse logo). Galileo thought it was moons but when two years later reviewed the planet had disappeared. Later in 1655 the Dutch astronomer Christian Huygens discovered Saturn having had a satellite orbiting Titan, announced that the planet should be surrounded by an equatorial ring.

The planet Mars

After our blue planet Earth from the Sun, The Mars is the fourth planet. It is known since historic times as the "Red Planet" because of its coloration, which stimulate much interest. His name is the god of war according to the Greco-Roman mythology.

Mars is one of the planets most fascinated us throughout history, the possibility that harbored life due to their similarities with our planet, has led to weave thousands of stories about and a great hope of finding microscopic life today, in these our days in which technology allows us to almost touch this dream with your hands.

Enlarge the probability of an asteroid crash with Earth

Scientists at the Cardiff Centre of Astrobiology, UK, have developed a mathematical model that confirms that currently is experience our solar system called the extensive hydroplane, which increase the chances of an asteroid collide with Earth. An asteroid is a rocky body that orbits the Sun Becomes meteorite when it enters Earth's atmosphere. In astronomy, is called the huge hydroplane in the middle of the region in which they are most of the stars of a flattened galaxy, as twist galaxies.