A review of ESA's astrometrical mission, Hipparcos (High Precision Parallax-Collecting Satellite), launched on the 8th August 1989.
This highly graphic presentation explains how Hipparcos was able to locate stars approximately 100 times more accurately than is possible from the ground. The principle of parallax is outlined, along with the methods used by the instrument to gather information. Data analysis is covered, using examples such as the collision between the comet Shoemaker-Levy and the planet Jupiter to illustrate the revolutionary accuracy provided by Hipparcos. The documentary also provides some specific information on the dynamics, composition and geography of our galaxy in light of the satellite's findings.