Vega mission

Vega mission

Either of two spacecraft missions, sponsored by the USSR, France, Germany, Austria, Bulgaria, Hungary, Poland, and Czechoslovakia. The main scientific goals were to study Venus by means of balloons and landers and to fly by Halley's comet. Vega 1 and Vega 2 were launched in 1984 (Dec. 15 and Dec. 21 respectively), flew past Venus on June 11 and June 15 1985, and used the gravitational assistance of that maneuver to fly by Halley on Mar. 6 and Mar. 9 1986 at miss distances of 8890 and 8030 km. The massive three-axis-stabilized TV systems on board unfortunately produced rather blurred images of the comet's nucleus. The dust mass spectrometers and dust detectors were, however, particularly successful. Results from the Vega mission enabled ESA to target the Giotto mission more accurately.
References in periodicals archive ?
After the Proba-V Earth observation satellite, injected into Sun-synchronous orbit on the second Vega launch, and IXV, injected into a ballistic trajectory for a demonstration mission on the fourth launch, this coming autumn Lisa Pathfinder will be sent towards the Lagrange L1 point for a scientific mission on the sixth Vega mission.
The dynamics of super-rotation are still a puzzle despite a wealth of data from landmark missions such as NASA's Pioneer Venus, Russia's Venera and VEGA missions, NASA's Magellan and more recently ESA's Venus Express," Widemann explained.
The scientists remain frustrated, even though some of them are participating -- under unofficial arrangements set up among individuals -- in the Soviet Vega missions to Comet Halley.