If you’ve been watching way too many Space:1999 re-runs like I have lately, you might have gotten the urge to travel through space and explore the universe. If so, here’s a neat little portable app to help you do that; it’s called Celestia and it’s available at portableapps.com. Here’s an image of the Moon:

The portableapps version is for Windows, but if you go to the Celestia web site, you’ll also find versions for Mac and Linux.