Gravitational Lensing
The file big-lens-grid0lensedimage.gif has a grid line drawn every 50 pixels. 1 pixel = 0.38 arcseconds.
File listing:
big-lens-0human-parameters.txt
big-lens-0lensedimage.gif
big-lens-grid0human-parameters.txt
big-lens-grid0lensedimage.gif
source.gif