NEXT SPACEFLIGHT

Status

Success

Venera 7

Launch Time
Mon Aug 17, 1970 05:38 UTC

First flight of Molniya-M /Block NVL. First spacecraft to land on Venus.

Rocket

Molniya-M /Block NVL
RVSN USSR
Status: Retired
Liftoff Thrust: 4,391 kN
Payload to LEO: 6,200 kg
Payload to GTO: 2,400 kg
Stages: 4
Strap-ons: 4
Rocket Height: 44.63 m
Fairing Diameter: 2.58 m
Fairing Height: 7.14 m

Mission Details

Venera 7

Venera 7 (Russian: Венера-7, meaning Venus 7) was a Soviet spacecraft, part of the Venera series of probes to Venus. When it landed on the Venusian surface on 15 December 1970, it became the first spacecraft to soft land on another planet and first to transmit data from there back to Earth.

The lander was designed to be able to survive pressure of up to 180 bars (18,000 kPa) and temperatures of 580 °C (1,076 °F). This was significantly greater than what was expected to be encountered but significant uncertainties as to the surface temperatures and pressure of Venus resulted in the designers opting for a large margin of error. The degree of hardening added mass to the probe which limited the amount of mass available for scientific instruments both on the probe itself and the interplanetary bus. The interplanetary bus carried a solar wind charged particle detector and a cosmic ray detector. On the lander there were temperature and pressure sensors as well as an accelerometer to measure atmospheric density. The probe also carried a radar altimeter.

Payloads: 1
Total Mass: 1,180.0 kg
Heliocentric Orbit

Location

Site 31/6, Baikonur Cosmodrome, Kazakhstan

Stats

1970

66th orbital launch attempt

Molniya-M

23rd mission
3rd mission of 1970
19th successful mission
12th consecutive successful mission