International Astronomical Union

Imagine, for example, a model reduced that the Sun would be represented by a ball of football (about 22 cm in diameter). At this scale, the Earth would be 23.6 m away and would be a sphere with just 2 mm in diameter (the moon would be about 5 cm from the ground and would have a diameter of about 0.5 mm). Jupiter and Saturn would ball with about 2 cm in diameter, to 123 and 226 m from the Sun respectively. Pluto would be 931 m away from the Sun, with close to 0.3 mm in diameter. As soon as the nearest star (Proxima Centauri) would be 6,332 km from the Sun, and star Syrian 13.150 km.

main objects of the central system Solar star El Sol is the star of the planetary system found in the Earth; Therefore, it is the closest to the Earth and the star with greater apparent brightness. Its presence or its absence in the sky determine, respectively, the day and the evening. The energy radiated by the Sun is harnessed by photosynthetic beings, which constitute the basis of the food, thus being the main source of life energy chain. It also provides the energy that keeps running climate processes. The Sun is a star located in the phase called main sequence, with a type spectral G2, which was formed about 5000 million years ago and will remain on the main sequence approximately another 5000 million years. The Sun, along with the Earth and all the celestial bodies that orbit to its form around the Solar System. Planets on 24 August 2006, in Prague, in the XXVI General Assembly the International Astronomical Union (IAU), excluded Pluto as a planet in the Solar System. After a long dispute about this resolution, the decision was taken unanimously.

This recognizes the error of having awarded the category of Planet Pluto in 1930, year of its discovery. From that day the Solar system is made up of 8 planets. 8 Planets of the Solar system, according to its proximity to the Sun, are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Planets are stars that describe paths called orbits to rotate around the Sun, have enough mass for its gravity to overcome rigid body forces so that they assume a spherical hydrostatic equilibrium (practically) and have cleared the neighbourhood of its orbit of planetesimals. Scientists have called Saturn, Jupiter, Uranus and Neptune gas planets in their atmospheres contain gases such as helium, hydrogen, and methane, without knowing with certainty its surface structure. Dwarf planets shortly after its discovery in 1930, Pluto was classified as a planet by the International Astronomical Union (IAU). However, based on subsequent discoveries, a debate was opened by some, in order to reconsider that decision. Finally, on August 24, 2006 the IAU decided that the number of planets is not extended to 12, as proposed in the meeting that kept its members in Prague, but that was reduced from 9 to 8. The big hurt of this new cosmic order was, again, the controversial Pluto, whose small size and its dynamic evolution in Solar system led to the members of the IAU to exclude definitively from its new definition of planet.

Systems Biometric

While millions of companies use some access controls, to restrict admission to certain areas, such controls are not infallible. Thus, magnetic stripe cards can be stolen, access passes can be forgotten and in many cases identification cards can be falsified. With all these problems, it is very possible that more than once, an unauthorized person has managed to outwit an access control system. Biometric systems can prevent this keep going. To use the features of a person as either a single or a combination of several-, your identity can be verified with a high level of precision. A biometric access can be applied in many ways. It is so commercial companies, military and even organizations non-profit institutions; they make use of this type of advance.

For example, many businesses only allow some employees entering certain areas, also, pharmaceutical companies give scientists access to their test laboratories, while some schools enroll their students using biometric systems. One example more specific, can be seen in Germany, where the electronic pass (ePass), which is a small chip that is implanted in the index finger of a person has been applied. This chip contains a photo of the person, as well as his fingerprints. People have a variety of unique features that can be identified. These can be used with different levels of success in a verification of identity. Many biometric access controls used a single, several qualities. The 5 most common qualities are:-fingerprints: each person has a set of fingerprints that are unique. -Iris: iris of a person can be analyzed for known, in a process of identifying patterns to authenticate.

-Facial features: factions in the face of a person can be compared to verify patterns that have been recorded in a database. -Voice patterns: when a person record his voice, is You can create a vocal signature that can be used in a future identification. -Hand geometry: hands, despite seem equal, are different in each person, due to its curves, its thickness and the position of the joints if it seeks a totally reliable access control, it is best go to biometric systems. These systems could eliminate all the problems, that the conventional mechanisms of access could never overcome.

Prime Minister

U.S. chooses its Presidents with a model that is halfway which governs South and North of its borders. Latin America has been taking the French system in which the President should be elected with more than 50% of the votes, allowing that there are two turns and that a plurality of parties that express to bases and different social projects they can compete in the first. Canada has the same model of Great Britain in which no President but a head of State for life and legacy (Queen Elizabeth II), and where the head of Government is a Prime Minister elected by a single-member Parliament. As there is no proportional representation the winner tends to stay with everything (the British Labour holds 55% of the Parliament despite the fact that it took only 35% of the votes). U.S. shares with the first model being a presidential Republic but lacks two turns. USA is not a constitutional monarchy but his agent is not elected directly, and the candidate who wins a State gets all electors of this (which may be cases like the) Bush who came to the White House despite having lost on votes). With that system USA has managed to be the only major country that has managed to avoid m ACE of two parties.