Extragalactic Web (2002)
This was a commission for Scientific American to accompany an article about
extragalactic space. Contrary to what you may believe, even the emptiest places are
not, well, empty. Extragalactic space is much more tenuous than interstellar space or
the space that pervades the Solar System, but it is still not quite a void. Gas
surrounds the galaxies and exists between them in a great web-like structure.