During the swing-by, the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS)on board Rosetta observed Earth’s night-side.
This image shows a simulated view of Earth as seen from the position of Rosetta, just before the spacecraft's closest approach to Earth. It was acquired on 13 November 2007 at 20:30 CET using the WAC with a red filter.