21 January
1908: On 21 January 1908, Bengt Strömgren was born in Copenhagen, Denmark.
27 FEB. 2004
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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.
The telescope’s earlier observations from March 2003 had revealed that the comet is approximately five-by-three kilometres, and shaped like a rugby ball on which it is possible to land. ESA Rosetta mission scientists needed to know the exact size of the solid nucleus to adapt the mission to the comet’s gravity.
Mediemodal
19 January
1747: On 19 January 1747, Johann Elert Bode was born in Hamburg, Germany.
18 January
2004: On 18 January 2004, the OMEGA instrument on ESA's Mars Express mapped the South polar cap of the Red Planet.
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