http://www.esa.int/images/Earth_night_annotated_H.jpg
 

http://www.esa.int/esaCP/SEM9MQ53R8F_index_1.html#subhead2
 

The Optical Spectroscopic and Infrared Remote Imaging System (OSIRIS)
camera on board Rosetta observed Earth during its swing-by last night.

This image was taken with the OSIRIS Wide Angle Camera (WAC) at 19:45
CET, about 2 hours before the closest approach of the spacecraft to
Earth. At the time, Rosetta was about 80000 km above the Indian Ocean
where the local time approached midnight (the angle between Sun, Earth
and Rosetta was about 160°).

Islands of artificial lights created by human habitation are sparsely
distributed over the part of the globe seen in the picture.

The image was taken with a five-second exposure of the WAC with the red filter.

Credits: ESA (c)2005 MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA
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Cool picture! Thanks David. :)
John