#4117
TheSkyX is a very powerful and popular astronomical telescope support software that contains an array of tools for advanced or amateur astronomers. It can simulate the starry sky in real time, adjust the time or location at random to see different sky scenes. Plus, it is capable of simulating all sorts of motion of the celestial bodies, as well as the astronomical wonders such like solar eclipse and lunar eclipse.

#4109
Microsoft WorldWide Telescope (WWT for short, now called AAS WorldWide Telescope) is a free and open-source virtual, visualized digital planetarium project (including application, data and cloud services) for both web browser (based on HTML5 and WebGL) and Windows desktop. It was originally created by Microsoft Research in 2002, and is now managed by the American Astronomical Society, and supported by grants from the Gordon and Betty Moore Foundation and National Science Foundation.