To reduce the size of large images you might want to take only a
part of the image.
The
following are several standard test
images taken from image database at http://sipi.usc.edu/database/

The next image is dust-gas protuberances of Eagle Nebula from
rst.gsfc.nasa.gov/
Sect20/A2.html. One can find many
astronomical images at that website.

The
following group of (larger in size) images is from Image Gallery
at:
http://www.galex.caltech.edu/imagegallery.html
The
Galaxy Evolution Explorer (GALEX), launched by a Pegasus rocket on
April 28 2003, has been observing the sky using detectors sensitive
to ultraviolet light.


Hubble_Subaru.bmp