Using the same standards of accuracy as published tables but with a catalogue extending beyond Barnard's Star; it can be used as a sight calculator, a definative astronomical reference or simply to print daily Nautical Almanac pages. Multiple sights can...

CyberSky is an accurate, yet easy-to-use planetarium program that provides an excellent way to learn about astronomy and explore the sky visible in the distant past, the present, and the far-off future. CyberSky can display and print attractive, highly-customizable maps...

StarStrider is a fully three-dimensional planetarium and 'software star ship'. You can visit not only the planets and moons of our solar system, but also hundreds of thousands of other stars. And you can view spectacular galaxies, cluster, nebulae and...