All cool images, but unfortunately most are not "true color". In many cases they are sampled in other wavelengths (e.g. infrared) and then colorized (the results of an infrared sample would be grayscale otherwise). This is often done to highlight particular features in an image for scientific visualization purposes. For example infrared can show you where cities and other human activity are (warmer than surrounding areas). UV can help identify terrain from plants. Etc.
It appears in that set of shots that even normal, visible spectrum imagery has been edited, too. For example the top shot appears to be an image of strange cloud shapes, and the caption confirms it ("Von Karman Vortices", e.g.
http://chamorrobible.org/images/photos/gpw-20061021-NASA-STS107-E-5059-Earth-from-space-clouds-von-Karman-vortices-Atlantic-Ocean-20030118-medium.jpg) but the color really doesn't match reality.
Oh well, it's all pretty anyway.
- Oshyan
