This is the Web Edition of "A Trip Into Space", a Coimbra-based electronic book on space science. Both the texts and the photos are by courtesy of National Aeronautics and Space Administration.

The Earth
Mid-Pacific Ocean

The image which follows was taken by the Solid State Imager (SSI) on Galileo during its first flyby of the Earth in December of 1990. The image was created by Dr. Edwin V. Bell, II (NSSDC/Hughes STX Corp.), from separate filter images present on the Galileo Imaging CD-ROMs. Although the image appears to be a natural color photo, it is actually produced by combining colorized versions of the green, red, and infrared (9680 nm) filters of the SSI. The green filter is colorized as blue, the red filter as green, and the IR filter as red and the resulting images combined. This particular filter combination was chosen to bring out the land surface features (which emits more strongly in the infrared) and de-emphasize the ocean/atmosphere features (which scatter blue light strongly). The software used to colorize and blend the individual images together was Color It!(tm).

Last Update: 2004-Nov-27