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Venera 7
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Venera 07
Venera 7 Mission to Venus

Goals: Venera 7's objective was to transmit data from the surface of Venus. Since the Venera 4, 5, and 6 missions ended when intense atmospheric pressure crushed the probes far above the ground, Venera 7's landing capsule was designed to withstand pressures of up to 180 atmospheres and temperatures as high as 540 degrees Celsius, more than enough to survive all the way to the planet's surface.

Accomplishments: Venera 7 was the first spacecraft to transmit data from the surface of any extraterrestrial planet, though its success was uncertain at first. The probe sent data to Earth for 35 minutes while falling through the atmosphere, but the data transmission appeared to be replaced by noise as soon as the capsule hit the ground. Computer processing revealed, however, that this noise contained nearly 23 minutes of additional information at 1 percent of normal signal strength. The transmitted data indicated a surface temperature of 475 give or take 20 degrees Celsius and a pressure of 90 give or take 15 atmospheres.

Key Dates
17 Aug 1970:  Launch
Status: Successful
Fast Facts
Venera 07 Facts Venera 7 was the first spacecraft to transmit data from another planet.

To help the probe endure Venus' blistering heat, a cooling system aboard the main spacecraft chilled the capsule to -8 °C before releasing it.

It is believed the initial loss of signal came when the capsule tipped on its side.
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Last Updated: 24 Jan 2011