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Sunday, August 06, 2006

To be formed a star or a planet not need a giant Sun.



The study of the formation of our Solar System has provided us important know-how [a) joint of ideas about how were formed: the Sun, the Moon, the planets and our Solar System, b) that stars 75 times, but large that Jupiter can burn Hidrogen (H), that between 14 and 75 times the size of Jupiter (brown dwarf stars -of minimal size- to generate reactions of nuclear fusion), alone can burn : Deuterium c) that the solar systems are formed for condensation of clouds of gas, constituting 1-2 or 3 stars, in the meantime the remanaing gaseous disk coalesce forming planets,etc.], although in the last 10 years some of these concepts be in revision. One of them is the definition of star, because the recently discovered brown dwarf stars by groups of ten, resemble planets, because they do not burn fuel and some planets beyond the solar system -to 5 times but large that Jupiter, do not resemble planets. In 2004, it was discovered a heavenly body (2M1207, constituted so alone by rocks and ice, located to 230 light years), 5 times but large that Pluto, rotating around a brown dwarf star in the constellation of Hydra, what turned questionable the inclusion of Pluto in the category of planet. Until it does little, planets and stars beyond the solar system were discovered indirectly by the deviation of the sunlight, to instances of pull of planetary gravity, but today mercy to the introduction of telescopes of diameter expanded (3, 6m and 8, 2 mts -Very Large Telescope), it is possible to photograph with clarity: planets and distant stars, adding questioning to some prior definitions

From heavenly bodies definition problems, it is passed also to question the ways of genesis of stars and planets. The astronomer-astrophysic of the University of Toronto : Ray Jayawardhana and the astronomer: Valentin D. Ivanov of European Southern Observatory (ESO), of La Silla-Chile, have photographed in the star forming region of Ophiucian (400 light years) : 2 heavenly bodies (Oph1622 : planemos a very young binary system : 1 millon years old), with similar colors and spectra of light (what tests that they are twins), united among them by their respective gravity forces. By being 14 times but large that Jupiter, it is think that one of the bodies is a brown dwarf star of exhausted fire and the other (7 times but large that Jupiter), be a body ~ to a planet, rotating both around themselves and wandering by the space. As their revolving disks of gas equal barely to 1% of our Sun and the planemos are a lot but large that their disks, Jayawardhama, thinks that the planemos were ejected of solar systems in formation… that perhaps the body ~ to a planet was joined subsequently to the brown dwarf star or perhaps…. the body ~ to a planet was formed in the way the stars do it. The other possibility is that clouds of gas of smaller density have been fragmented in multiples smaller pieces (by scrapings forces), being formed brown dwarf stars. As already 200 vagabonds planets are known beyond our solar system, it is possible to imagine the Earth or other heavenly bodies mobilizing in the future, like gigantic ships or, perhaps being integrated to other solar systems or maybe to dwarf stars, with fire even. Perhaps, the fuel of some brown dwarf stars can be artificially increased becoming true stars.

Estrellas y planetas formadas sin soles paternalistas

El estudio de la formación de nuestro Sistema Solar nos ha proporcionado importantes conocimientos [a) conjunto de ideas acerca de cómo se formaron : el Sol, la Luna, los planetas y nuestro Sistema Solar, b) que las estrellas 75 veces, mas grandes que Júpiter pueden quemar H simple, que las comprendidas entre 14 y 75 veces el tamaño de Júpiter (estrellas enanas marrones, de tamaño minimo, para generar reacciones de fusión nuclear), solo pueden quemar: Deuterio. c) que los sistemas solares se forman por condensacion de nubes de gas, constituyendo 1-2 o 3 estrellas, en tanto el disco gaseoso remanente, coalesce formando planetas,etc.], aunque en los ultimos 10 años algunos de estos conceptos esten en revisión. Uno de ellos es la definición de estrella, porque las enanas marrones descubiertas recientemente por decenas, semejan planetas, porque no queman combustible y algunos planetas extrasolares -hasta 5 veces mas grandes que Júpiter, no semejan planetas. El año 2004, se descubrió un cuerpo celeste (2M1207,constituido tan solo por rocas y hielo,ubicado a 230 años luz), 5 veces mas grande que Pluton, girando alrededor de una estrella enana marrón en la constelación de Hydra, lo que llevó a cuestionar la inclusión de Pluton en la categoría de planeta. Hasta hace poco planetas y estrellas extrasolares eran descubiertas indirectamente por la desviación de la luz del Sol, a instancias de la gravedad planetaria, pero hoy merced a la adicion de telescopios de diámetro ampliado (3, 6m y 8,2mts: Telescopio de Gran Longitud), se está logrando fotografiar con claridad : planetas y estrellas distantes, agregando interrogantes a algunas definiciones previas.

De los problemas de definición de cuerpos celestes, se esta pasando tambien a cuestionar los modos de genesis de estrellas y planetas. Resulta el astronomo-astrofisico de la Universidad de Toronto: Ray Jayawardhama y el astronomo Valentin D. Ivanov del European Southern Observatory (ESO), de la Silla-Chile, han fotografiado en la region formadora de estrellas de Ofiuco (400 años luz), 2 cuerpos celestes (Oph1622 : planemos, sistema binario jóven : 1 millon de años), con colores y espectros de luz similares (lo que prueba que son gemelos), unidos entre si por sus respectivas fuerzas de gravedad. Por ser 14 veces mas grande que Jupiter, se piensa que uno de los cuerpos es una estrella enana marron de fuego apagado y el otro (7 veces mas grande que Júpiter), sea un cuerpo ~ a un planeta, girando ambos alrededor de si mismos y vagabundeando por el espacio. Como sus discos giratorios de gas equivalen apenas al 1 % de nuestro Sol y los planemos son mucho mas grandes que sus discos, Jayawardhama, piensa que los planemos fueron eyectados de sistemas solares en formación… que tal vez el cuerpo ~ a un planeta se unio posteriormente a la estrella enana marron o tal vez…. el cuerpo ~ a planeta se formó al modo a como lo hacen las estrellas. La otra posibilidad es que nubes de gas de menor densidad hayan sido partidas en multiples piezas menores (por fuerzas de rozamiento), formandose estrellas enanas. Como ya se conocen 200 planetas vagabundos extrasolares, es posible imaginar a la Tierra u otros cuerpos celestes movilizandose a futuro, al modo de naves gigantes, talvez integrandose a otros sistemas solares o quizas a estrellas enanas, con fuego aun. Talvez, se pueda incrementar el combustible de fusion nuclear de las estrellas enanas convertiendolas en estrellas verdaderas.

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