Prospero became the first British satellite to have been launched successfully by a British rocket.
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The US Mariner 9 was launched – it went on to become the first satellite to orbit Mars.
The Gemini V spacecraft returned to Earth, landing in the Atlantic Ocean.
NASA launched its Mariner 7 space probe from Cape Canaveral atop an Atlas-Centaur rocket.
Russian spacecraft Vega 2 landed on Venus.
The USSR launched the Sputnik III.
