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The first significant space experiment is placed on board a Soviet space probe

France did not have its own space launchers to send probes into the solar system. However, the Franco-Soviet collaboration in space, very active during the 1960s, opened a number of interesting prospects. Installed on a Soviet probe going to Mars, the Stereo I experiment of the Observatory’s space astronomy section observed solar radio bursts at the same time as the Nançay radio-heliograph, thus enabling their directivity to be determined.

caption : Antenna of Nançay for Stereo I - credits : Observatoire de Paris