Latest Tycho-2 Catalogue Stories
2007-10-01 13:59:35
It has been ten years since the release of the Hipparcos and Tycho catalogues, the first astrometric catalogues produced from observations in space. The Hipparcos catalogue has since been re-processed and fine-tuned, providing the best map of our galaxy to date.ESA's Hipparcos (High Precision Parallax Collecting Satellite), launched in 1989, was the first, and so far only, space-based astrometry mission. Designed to determine the position and distance of more than 100 000 stars, its accuracy...
