description Vega 1 Overview
Vega 1 was a Soviet space probe launched in December 1984 to study Venus and Halley's Comet. In June 1985, the spacecraft deployed a descent module containing a lander and an instrumented balloon into the atmosphere of Venus. Following this successful deployment, the main spacecraft continued its journey to intercept Halley's Comet in March 1986. The mission provided significant data on the atmospheric conditions of Venus and the composition of the comet.
help Vega 1 FAQ
Why did Vega 1 visit both Venus and Halley's Comet?
The spacecraft used a Venus encounter to deploy atmospheric instruments and to redirect its main craft toward Halley's Comet. Its name combines the Russian names for Venus, Venera, and Halley, Gallei.
What did Vega 1 release into Venus's atmosphere?
It released a descent module containing a lander and a helium balloon in June 1985. The balloon drifted through Venus's cloud layer and transmitted measurements of temperature, pressure, winds, and atmospheric conditions.
How close did Vega 1 get to Halley's Comet?
Vega 1 flew within roughly 9,000 kilometers of the comet's nucleus in March 1986. Its images and dust measurements helped later spacecraft, especially ESA's Giotto, refine their plans for closer encounters.
Was Vega 1 the only Soviet probe sent on this mission?
No, Vega 2 was launched shortly afterward with the same combined Venus and Halley's Comet objectives. The twin missions provided complementary atmospheric, imaging, plasma, and dust observations.
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