xearth

xearth displays an image of the earth, as seen from your favorite vantage point in space (this can be your current position), correctly shaded for the current position of the sun. By default, xearth updates the displayed image every five minutes. The time between updates as well as many parameters can be changed using the settings.

This is a completely rewritten port of xearth V.1.1 for UNIX. See also: http://hewgill.com/xearth/original/