|Very nice! The site seems to work very well so far.|
One thing to note about the "Find stars in range" feature. If you enter a high number, you'll get a list of several thousand entries. Even entering 1000 for each direction will cover around 75% of those systems. I'm not sure how much load that puts on the server, but at the very least it makes for a rather lengthy page. : )
Maybe there could be a limit of something like 100 ly, or results that are split into shorter, 100 entry pages. Also, I'm not entirely sure if there's much need to enter separate x, y, and z values. You might just take a single "distance" variable, and then cross-check whether the results are within that spherical radius.