Apologies if this has been posted already.

NASA has released the "next generation" of their Blue Marble image maps of
the earth: http://earthobservatory.nasa.gov/Newsroom/BlueMarble/

The images are higher quality that the previous versions, cover topography,
bathymetry and the cloudless surface (one for each month of the year).

Resolutions are 5400 by 2700 (8km per pixel) and 21600 by 10800 (2km per
pixel) and, as usual, are free.

Very nice. :)

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