Stellarium
While it’s not really aviation-related, I’ve been playing around with this software a bit today and it’s just too cool not to mention. It’s called Stellarium and is a free and open source planetarium for your computer. The graphics are absolutely amazing. You can set your location anywhere in the world and have a real-time view of the sky at that point. As time moves along, so do the stars, planets. nebulas, etc. You can even move time forwards and backwards at accelerated rates and see how the stars line up and move around. Great fun if you have some time to kill, or a passion for astronomy.
