Claudia Alexander, U.S. Rosetta Project and Comet comet 67P/Churyumov-Gerasimenko

I am reading about Claudia Alexander here (http://rosetta.jpl.nasa.gov/claudia-alexander-0) and the U.S. Rosetta Project here (http://rosetta.jpl.nasa.gov). I am looking at an image of comet 67P/Churyumov-Gerasimenko taken by Rosetta spacecraft's OSIRIS narrow-angle camera on 7 August 2014 and posted here (http://rosetta.jpl.nasa.gov/news/seen-rosetta-comet-surface-variations).