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talk about astronomy.

The Astronomy is the science that deals with the study of celestial bodies, their movements, phenomena connected with them, recording and investigation of their origin from the information that reaches them through electromagnetic radiation or any other means. Astronomy has been linked to humans since ancient times and all civilizations have had contact with science. People like Aristotle, Ptolemy, Copernicus, Brahe, Kepler, Galileo, Newton, Kant, and Einstein Kirchhoff have been some of his growers.

is one of the few sciences where amateurs can still play an active role, especially in the discovery and monitoring of phenomena and light curves of variable stars, the discovery of asteroids and comets, etc. Do not confuse astronomy with astrology. Although the two fields share a common origin, are very different astronomers follow the scientific method, while astrologers deal with the alleged influence of the stars in the life of men.

Astronomy is divided into four main branches:

v Astronomy position

v Celestial Mechanics

v Astrophysics

v Cosmology .

· Astronomy position. Is to place on the celestial sphere of the stars position measuring angles with respect to certain fundamental planes, using different systems of astronomical coordinates. It is the oldest branch of this science. Describes the motion of the stars, planets, satellites, and phenomena such as eclipses and planetary transits the disk of the Sun also studied the diurnal motion and the annual movement of the sun and stars. Includes description each of the planets, asteroids and satellites of the Solar System. Are fundamental tasks of identifying the same time and determination to navigation geographic coordinates.

· Celestial mechanics. Aims to interpret the movements of the astronomy of position, in the field of physics known as mechanics, usually the Newtonian (Law of Universal Gravitation of Isaac Newton). Study the motion of planets around the Sun, their satellites, calculating the orbits of comets and asteroids. The study of motion of the Moon Earth around its complexity was very important for the development of science.

· Astrophysics. It is a modern part of astronomy that studies the stars and bodies of physics studying the composition, structure and evolution. It was only possible its inception in the nineteenth century thanks to the spectra could determine the physical composition stars. The branches of physics are involved in the study of nuclear physics (energy generation within stars) and the physics of relativity.

· Cosmology. Is the branch of astronomy that studies the origins, structure, evolution and birth of the universe as a whole.

In a specific division are:

· Astrometry. Study of the position of objects in the sky and its change of position. Defines the coordinate system used and the kinematics of objects in our galaxy.

· Astrophysics . Study of physics of the universe, including the properties of astronomical objects (luminosity, density, temperature, chemical composition).

· Cosmology. Study of the origin of the universe and its evolution. The study of cosmology is the ultimate expression of theoretical astrophysics.

· Formation and evolution of galaxies . Study galaxy formation and evolution.

· galactic astronomy. Study of the structure and components of our galaxy and others.

· extragalactic astronomy. Study of objects outside the Milky Way.

· stellar astronomy. Study of star birth, evolution and death.

· Stellar Evolution. Study of the evolution of stars from their formation to his death as an outcast star.

· star formation. Study of conditions and processes leading to star formation within clouds of gas.

· Planetary Science. Study of the Solar System planets and extrasolar planets.

· Astrobiology. Study of the emergence and evolution of biological systems in the universe.