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Wednesday, June 13, 2012

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.

Tuesday, June 12, 2012

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.