Friday, January 19, 2007

We are not alone.


An important sector of physics participates of Fermi's paradox, that establishes that if extraterrestrial life does exist : why they don’t visit us. Rasmus Bjork a physic from Niels Bohr Institute/Copenhagen, using computer’ simulation of the Milky Way, assures that this task has been impossible until now because the enormous intergalaxies distances. Bohr assures that even though the extraterrestrial ones were sending exploratory probes in search of life, these alone reached stars but near them. Even they could travel to 1/10 of the speed of the light, or 30 000 km/s, the distances will continue being enormous. As a comparison, to the Cassini probe (NASA, in mission towards Saturn), that travels to 32 km/s, will it take 10 billions years to explore single 4% of the Milky Way. Although they used radio or TV receivers waves (originated in colonized planets) or if the extraterrestrial could travel through warmholes it still take million years to them to find planets that host life. Not in these times, but in the near future (with aid of robots) it will be possible find alien life.

No estamos solos.


Un sector importante de fisicos participa de la paradoja de Fermi, que establece que si los extraterrestres existen : porque no nos visitan?. Rasmus Bjork fisico del Niels Bohr Institute de Copenhagen, empleando simulaciones en computadora de la Via Láctea, asegura que esto se debe a las enormes distancias intergalácticas. Bohr asegura que aún cuando los extraterrestres estuvieran enviando sondas exploratorias en busca de vida, estas solo alcanzarian a las estrellas más cercanas a ellos. Aún, si pudieran viajar a 1/10 de la velocidad de la luz o, 30 000 km/s, las distancias continuarían siendo enormes. A modo de comparación, a la sonda Cassini (NASA, en misión hacia Saturno), que viaja a 32 km/s, le tomaria 10 billones de años explorar solo el 4% de la Via Láctea. Aunque emplearan receptores de radio o TV ( provenientes de planetas colonizados) o pudieran viajar a través de agujeros de gusano, les tomaría aún millones de años encontrarnos. Lo que no torma el problema en insalvable. En un futuro próximo..tal véz con la ayuda de robots.

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