Comet C/201 S1 ISON, photographed by Pete Lawrence on Friday, Nov. 22, 2013 at Roques de los Muchachos Observatory on the Island of La Palma, will pass behind the sun and return toward Earth. Local astronomers hope to photograph Comet ISON as it travels back toward Earth. (Staff Photo by BONNIE VCULEK)

Comet C2012 S1 ISONPete LawrenceRoques de los Muchachos ObservatoryIsland of La PalmaEarthAstronomers Bonnie VculekEnid