The long-awaited second edition of Wil Tirion's superb Sky Atlas 2000.0 offers 43,000 additional stars, with all positions now derived from the Hipparcos database. The Atlas opens out to reveal 28 ...

The 110 star clusters, nebulae and galaxies of Messier's catalog are among the most popular of all the deep sky objects and are beautiful targets for amateur observers of all abilities. This stunning ...