Tuesday 18 October 2016

Astrognome Scrapbook Venera 4

Venera 4

At 04.34 UT on October 18th 1967 Venera 4 became the first probe to transmit data from the atmosphere of another planet.

 The scientific instruments had been turned on 5 minutes after separation at an altitude of about 55 km and remained on for 93 minutes, returning 23 sets of readings, until it reached an altitude of roughly 25 km, where it was destroyed by the  atmospheric pressure  and  very high temperature around 277 C. The probe measured an atmospheric composition of 90 - 95% carbon dioxide.

 It was initially believed that the probe had reached the ground and the measured temperature and pressure represented the surface values on Venus.

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