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ASTRONOMIA Astrofotografia - Más valoradas/La supernova 1994D y el Universo inesperado
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Warning: strftime() [function.strftime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /home/astrogui/public_html/astroalbum/include/functions.inc.php on line 168

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Warning: strftime() [function.strftime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /home/astrogui/public_html/astroalbum/include/functions.inc.php on line 169

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Deprecated: Function ereg_replace() is deprecated in /home/astrogui/public_html/astroalbum/include/functions.inc.php on line 168

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Deprecated: Function ereg_replace() is deprecated in /home/astrogui/public_html/astroalbum/include/functions.inc.php on line 168

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La supernova 1994D y el Universo inesperado
Muy lejos y hace mucho tiempo explotó una estrella. La supernova 1994D , visible como el punto brillante en la parte inferior izquierda de la imagen, sucedió en las afueras de la galaxia NGC 4526 . La supernova 1994D no fue interesante por lo diferente, sino por lo parecida a otras supernovas . De hecho, la luz emitida en las semanas posteriores a la explosión hizo que se le diera la familiar designación de supernova Tipo Ia . Si todas las supernovas de Tipo 1a tienen el mismo brillo intrínseco, entonces entre más débil sea una supernova, más lejos debe haberse producido. Calibrando una precisa relación brillo-distancia , los astrónomos son capaces de estimar no solo la tasa de expansión del Universo (cuyo parámetro es la Constante de Hubble ), sino también la geometría del Universo en que vivimos (cuyos parámetros son Omega y Lambda ). El gran número y enormes distancias a las supernovas medidas en los últimos años han sido interpretados como indicadores de que vivimos en un Universo inesperado .
 
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