25 January
1736: On 25 January 1736, Joseph Louis Lagrange was born in Turin, Italy.
27 FÉVR. 2004
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1515
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1978: On 26 January 1978, ESA launched IUE, the world's longest-lived and most productive satellite.
It worked non-stop from launch until it was switched off in September 1996, 14 years later than originally planned. Although IUE produced no images, it provided invaluable data by measuring the energies of ultraviolet rays coming from celestial objects, giving insight into the physical conditions of these objects.
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24 January
1986: On 24 January 1986, NASA's Voyager 2 performed a fly-by of Uranus.
23 January
1930: On 23 January 1930, Clyde Tombaugh photographed the planet Pluto.
22 January
2004: On 22 January 2004, ESA reported that the NASA/ESA Hubble Space Telescope had measured the size, shape and rotational period of the Rosetta mission's target, comet 67P/Churyumov-Gerasimenko.
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