An essential tool for every astronomer. The star atlas and skyguide that makes it really easy to pick the best objects, make your own observation list and use it when you are outside.

Ad Astra contains detailed maps of all 88 constellations, and descriptions of thousands of objects: star clusters, planetary nebulae, galaxies, double stars and variable stars. All within reach of amateur telescopes and in a lot of cases, also viewable in binoculars.