Last week Tekzilla Daily had a segment about Stellarium. I was certain that I had written about Stellarium in the past, but when I checked the archives I couldn’t find the post. Stellarium is an open source program for Mac, Windows, and Linux that puts a virtual planetarium on your computer. Stellarium allows you to explore space as if you were looking up at the night sky through a telescope. Watch the video below to learn more and to see Stellarium in action.