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Friday, January 27, 2006

Time machine

At the beginning all thought that will be serious difficult to study to the black holes, due to its dangerous, absorbent and intense gravitational field. Nevertheless the recent visibilization of the limits of some of them (See Ciencia. : Black holes: not so black.11/05/2005), have permitted to calculate its areas and now the theoric predictions until assure the existence of white holes. That is to say, if a place exists where something falls and cannot leave (black hole), then should exist another where the same thing is is expelled -to the space-. On the other hand, the American Kip Thorne and the Russian Igor Novikov, have advanced that if an interned man in a black hole could travel faster than the velocity of the light he would emerge in another universe (in the future, white hole), in which he look old,,782623,00.html and even could see to his grandson. Sadly for him it would very very dificcult to return to the present time to count what he saw. Theoretical physics, have advanced that the connection between white and black holes would be made by channels of space-time, species of channels of empty vacuum with negative pressure, by where men can reach the world of future or, retrace the time. Since 1987, the Russian Vadim Chernobrov, is stubborn in building a time machine. Nevertheless many passed or future facts are non modifiable, due to that the past influence to the future and vice versa.
La máquina del tiempo.

Al principio se pensaba que seria difícil estudiar a los agujeros negros, debido a lo peligroso y absorbente de su intenso campo gravitacional. No obstante la reciente visibilizacion de los limites de algunos de ellos (Ver Ciencia.: Black holes: not so black.11/05/2005), han permitido calcular sus areas y ahora las predicciones teoricas hasta aseguran la existencia de agujeros blancos. Es decir, si existe un lugar donde algo cae y no puede salir (agujero negro), entonces debe existir otro hacia donde se expulsa -al espacio- un objeto similar. De otro lado, el americano Kip Thorne y el ruso Igor Novikov, han postulado que si un hombre internado en un agujero negro pudiese viajar mas rapido que la velocidad de la luz emergeria en otro universo (del futuro, agujero blanco), en el que se veria mas viejo y hasta podria toparse con su nieto. Lamentablemente le seria muy dificil regresar al tiempo presente para contar lo que vio. Fisicos teoricos, postulan que la conexión entre agujeros negros y blancos se materializaria por tuneles del espacio-tiempo (madrigueras de topos), especie de canales de vacio con presion negativa, por donde se podria acceder al futuro o, desandar el tiempo. El ruso Vadim Chernobrov esta desde 1987, empecinado en construir una maquina del tiempo No obstante muchos hechos pasados o futuros serian difícilmente modificables, debido a que el pasado influencia al futuro y viceversa.


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