Vega 1 and 2 was vessels sisters Soviet S developed starting from the program Venera. The mission included/understood the sending of an undercarriage and a balloon on Venus and the study of the Halley's Comet.

The probe Vega 1 of 4.920 kg was launched by a rocket Proton on December 15th, 1984 since the Cosmodrome de Baïkonour.

Venus mission

Vega 1 arrived in the Venus orbit the June 11th 1985 and sent to it a unit of descent of 1.500 kg to 11 km/s which was slows down by parachutes. The undercarriage was identical to those of the Venera missions. A blow of strong wind prematurely started to 20 km of altitude the measuring instruments on the ground which thus did not give any data. The balloon separated from the undercarriage to 55 km of altitude where there remained stabilized, thorough by winds of 248 km/h, traversing a distance of 11.600 km until its last communication, subjected to an average pressure of 535 mbar and a temperature of 300-310 K.

Halley mission

The probe used the Venus gravity to intercept the Halley's Comet which it approached to 8890 km on March 6th. The probe analyzed during three hours the core of comet and the properties of its surface and the images were used to direct the probe Giotto. Vega 1 discovered temperatures of the core from 300 to 400 K, a size of 14 km and a rotation of 53h.

See too

• Programme Venerated
• Programme Vega

External bonds

• Vega mission images from the Space Research Institute (IKI)
• Raw dated from Vega 1 and Vega 2 one board instruments
• Soviet Exploration off Come

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