27 September
2003: On 27 September 2003, SMART-1 left Earth on a long journey to the Moon. It was launched from Europe’s Spaceport at Kourou, French Guiana, at 20:14 hrs local time ...
27 FÉVR. 2004
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1953: On 28 September 1953, Edwin Hubble died.
Hubble was an American astronomer who is considered the founder of extragalactic astronomy and who provided the first evidence of the expansion of the universe.
In 1923-5 he identified Cepheid variables in 'spiral nebulae' M31 and M33 and proved conclusively that they are outside our Galaxy. His investigation of these objects, which he called extragalactic nebulae and which astronomers today call galaxies, led to his now-standard classification system of elliptical, spiral, and irregular galaxies, and to proof that they are distributed uniformly out to great distances.
Hubble measured distances to galaxies and in 1929 he published the velocity-distance relation which is the basis of modern cosmology.
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26 September
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, ...
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 ...
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 ...
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