In 1970, Venera 7 appeared to fall silent when it hit Venus, but engineers later found 23 minutes of faint radio data buried in the recording — the first transmission ever received from the surface of
Engineers discovered 23 minutes of previously overlooked radio data from the 1970 Soviet Venera 7 mission to Venus. This data confirms the probe successfully transmitted from the surface, marking the first time humanity received signals from another planet.
Why it matters
This historical correction highlights the persistence of early space exploration efforts and the importance of re-analyzing archival data with modern technology.
What ground control dismissed as static turned out to be humanity's first whisper from another world.
By Space Daily Editorial Team · Editorial process
Venera 7’s radio signal appeared to end when the Soviet capsule reached Venus on 15 December 1970. The strong descent transmission dropped at impact, leaving what ground stations initially treated as unintelligible noise.
The recording had not ended with the apparent failure. Computer processing later separated a much weaker trace from the background and recovered 22 minutes 58 seconds of post-impact data. Rounded to 23 minutes in mission histories, it was the first transmission received from the surface of another planet.
Venera 7 did not wake up and call Earth again. Its transmitter continued operating, but the signal became so faint at touchdown that its survival could only be established by returning to the recorded radio data.
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