On July 1, 2013, at 6:09 p.m. EDT, the sun erupted with a coronal mass ejection, or CME, a solar phenomenon that can send billions of tons of solar particles into space that can affect electronic systems in satellites. Experimental NASA research models based on NASA's Solar Terrestrial Relations Observatory show that the CME was not Earth-directed and it left the sun at around 570 miles per second.
Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...



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La prevención del VIH no llega a las jóvenes sudafricanas

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