Irrefutable evidence for this relationship showed up in the first-season
episode, A Voice in the Wilderness, part 2. An Earth Alliance
battleship named "Hyperion" appeared in this episode.
The Lurker's Guide to
Babylon 5 was originally hosted at hyperion.com.
(By the way, the Lurker's Guide is the most complete, best organized
archive of B5 info out there.)
Here's a small shot of the ship; click on it to download the full-sized,
70KB JPEG file.
The Lurker's Guide to Babylon 5 was my initial reason for learning about the web and HTML.
Here's a whole page devoted to the lovely Russian 2nd-in-command, Susan Ivanova.
And for the Martian fanciers among you, there's NASA's Center for Mars Exploration, including the periodical Mars Today.
The NASA "For Students" page is a launching pad for all kinds of cool space stories and facts.
More cool links courtesy of Lindsey Weiss: