20 May
2003: On 20 May 2003, ESA announced that its four Cluster spacecraft had made a remarkable set of observations that led to a breakthrough in understanding the origin of a ...
27 VEEBR. 2004
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1839: On 21 May 1839, Nils Christofer Dunér was born. He was a Swedish astronomer who had a career spanning both classical astronomy and astrophysics. Dunér is mostly known for his introduction of new astrophysical techniques. In 1867-75, he made 2679 micrometre measurements of 445 double and multiple stars. After publishing his catalogue of double star measurements in 1876, Dunér turned to spectroscopy. Dunér first specialised in observing the spectra of red stars and later, he made a series of measurements of the Doppler shift caused by solar rotation.
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19 May
1971: On 19 May 1971, the Soviet Union launched Mars 2 and 3. Mars 2 arrived on 27 November and Mars 3 on 2 December 1971.Both spacecraft were fitted with ...
18 May
1991: On 18 May 1991, British-born cosmonaut Helen Sharman was launched into space on board a Soyuz spacecraft.The first Briton in space, alongside crew mates Anatoli Artsebarsky and Sergei Krikalev, ...
17 May
2000: On 17 May 2000, the NASA/ESA Hubble Space Telescope captured a true-colour image of nebula N11A.N11A lies within a spectacular star-forming region in the Large Magellanic Cloud, a small ...
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