25 September
1644: On 25 September 1644, Ole Christensen Rømer was born.Rømer was a Danish astronomer who demonstrated conclusively that light travels at a finite speed. He measured the speed by precisely ...
27 VEEBR. 2004
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2003: On 26 September 2003, at 10:15 local time, the Ariane 5 launch vehicle carrying ESA's SMART-1 payload was rolled out to the launch pad at Europe's Spaceport in Kourou, French Guiana.
The launch readiness review had taken place the previous day, 25 September. The launch vehicle, its payload (SMART-1 and its companions INSAT 3E and e-BIRD) and the ground infrastructure were all declared ready for a launch on 27 September with a launch window opening at 23:02 UT.
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24 September
1906: On 24 September 1906, Pol Swings was born.Swings was a Belgian astrophysicist who made spectroscopic studies to identify the elements and structure of stars and comets. He discovered the ...
23 September
1846: On 23 September 1846, Neptune was first observed very near to the locations independently predicted by astronomers Adams and Le Verrier. They had made their calculations based on the ...
22 September
2003: On 22 September 2003, ESA's SMART-1 spacecraft was integrated with its Ariane 5G launcher at Europe's spaceport in French Guiana. This was done in preparation for launch on board ...
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