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168 years ago, in 1858:
Friedrich August Theodor Winnecke 'rediscovers' comet 7P/Pons–Winnecke.
92 years ago, in 1934:
Yuri Gagarin is born in Klushino, Russian SFSR, Soviet Union.
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65 years ago, in 1961:
The Soviet dog Chernushka makes one orbit on board Korabl-Sputnik-4 or Vostok-3KA No 1 (Sputnik 9) with a cosmonaut dummy, mice and a guinea pig.
61 years ago, in 1965:
OSCAR 3 is launched, becoming the first amateur satellite to use solar power and relay signals from Earth.
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52 years ago, in 1974:
Mars 7 reaches Mars and prematurely releases its descent module, which misses the planet.
47 years ago, in 1979:
From Voyager 1's optical navigation images, the first active volanoes beyond Earth are discovered at Jupiter's moon, Io.
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40 years ago, in 1986:
The Soviet Vega 2 probe makes its closest approach to Halley's Comet, coming to within 5000 miles (8000km).
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