This July 4th the solar system is showing off some fireworks of its own. Superficially resembling a skyrocket, comet ISON is hurtling toward the sun presently at a whopping 48,000 mph. Its swift motion is captured in this time-lapse movie made from a sequence of pictures taken May 8, 2013, by NASA's Hubble Space Telescope.
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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