Easy to use, informative, frequently updated

The title says it all. The recent addition of galaxy view is magnificent. You can zoom in to see details in our Solar System (e.g. 67P comet in 3D view), then continue zooming out until you see the the whole Milky Way. If the stars locations are indeed correct, looking at zoomable rotatable 3D actual galaxy is simply jaw-dropping.

Thomson i Ania about Exoplanet, v14.3