As Comet ISON heads toward its closest approach to the sun -- known as perihelion -- on Nov. 28, 2013, scientists have been watching through many observatories to see if the comet has already broken up under the intense heat and gravitational forces of the sun.
Fuente : http://www.eurekalert.org/pub_releases/2013-11/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2013-11/nsf...