Tuesday, October 04, 2011

NOBEL PRIZE IN PHYSICS 2011

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2011 Nobel Prize in Physics was awarded to astronomers Saul Perlmutter (Lawrence Berkeley National Laboratory), Brian Schmidt (Weston Creek/Australia) and Adam G. Riess (Space Telescope Science Institute/Johns Hopkins University/Baltimore) for his discoveries -since 1998- of accelerating expansion of the universe, observing Type Ia supernova explosions (stars as heavy as our sun but as small as the Earth), emitting as much light as the total of our galaxy. Using sophisticated telescopes on earth and in space, powerful computers and new sensors for digital imaging (CCD), they studied 50 supernovae found that their light was weaker than expected -a sign that the expansion of the universe was accelerating- feeling that if this continued to accelerate (forced by dark energy, which makes up ¾ of the universe), our universe ultimate fate is cold, very cold. According to quantum theory, empty space exerts a repulsive force like that exerted by dark energy but that is 10 120 times stronger than that measured by astronomers, leaving open the possibility of the possible existence of multiverses.

PREMIO NOBEL DE FISICA 2011
El Premio Nobel de Física 2011, fue otorgado a los astrónomos Saul Perlmutter (Lawrence Berkeley National Laboratory), Brian Schmidt (Weston Creek/Australia) y Adam G. Riess (Space Telescope Science Institute/Johns Hopkins University/Baltimore), por sus descubrimientos –desde 1998- de aceleración de la expansión del Universo mediante observación de explosiones de supernovas tipo Ia (estrellas tan pesadas como nuestro sol pero tan pequeñas como la Tierra), que emiten tanta luz como el total de nuestra galaxia. Empleando sofisticados telescopios ubicados en la tierra y en el espacio, poderosas computadoras y nuevos sensores de proyección de imágenes digitales (CCD), estudiaron 50 supernovas constatando que su luz era mas debil de lo esperado, signo de que la expansion del universo se estaba acelerando, intuyendose que si esta continuaba acelerandose (forzada por la energía oscura, que compone ¾ del universo), este terminara helado. Segun la teoría cuántica el espacio vacio ejerce una fuerza repulsiva semejante a la ejercida por la energía oscura pero que es 10120 veces mas fuerte que lo medido por los astrónomos, dejando abierta la posibilidad de la posible existencia de multiversos.

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