23 January
1930: On 23 January 1930, Clyde Tombaugh photographed the planet Pluto.
27 FEB. 2004
publication date
1966
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1986: On 24 January 1986, NASA's Voyager 2 performed a fly-by of Uranus.
Voyager 2 obtained clear images of each of the five large moons of Uranus - Miranda, Ariel, Umbriel, Titania, and Oberon (known before the encounter), and discovered ten new moons.
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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.
21 January
1908: On 21 January 1908, Bengt Strömgren was born in Copenhagen, Denmark.
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