Your Sky makes custom maps of the
sky for any location on Earth and any date from 4713 B.C. into the
distant future. Maps can include stars as faint as magnitude 6.5,
constellation names, outlines, and boundaries, the Moon and planets,
deep sky objects from a database of more than 500, and a comet or
asteroid whose position is calculated from its orbital elements. A
variety of display options allow customising the map for its intended
use.