19 June
2003: On 19 June 2003, the high-gain antenna (HGA) on ESA's SOHO spacecraft suffered a malfunction in its pointing mechanism - a stuck motor drive would not permit the antenna ...
27 FÉVR. 2004
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1976: On 20 June 1976, NASA's Viking 1 probe, launched from Cape Canaveral, went into Mars orbit. The lander set down on the western slopes of Chryse Planitia a month later. It soon began its programmed search for Martian micro-organisms and sent back incredible colour panoramas of its surroundings. Scientists learned that the Mars sky was pinkish in colour, not dark blue as they originally thought. The sky is pink due to sunlight reflecting off the reddish dust particles in the thin atmosphere. The lander set down among a field of red sand and boulders stretching out as far as its cameras could image.
1966: On 20 June 1966, Georges Lemaître died.
Lemaître was a Belgian astronomer and cosmologist, born in Charleroi, Belgium. In 1927 he proposed the modern big-bang theory. He reasoned that if the universe was expanding now, then the further you go in the past, the universe’s contents must have been closer together. He envisioned that at some point in the distant past, all the matter in the universe was in an exceedingly dense state, crushed into a single object he called the 'primeval super-atom' which exploded, with all its constituent parts rushing away. This theory was later developed by Gamow and others.
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18 June
1926: On 18 June 1926, Allan Rex Sandage was born.Sandage was an American astronomer who, together with Thomas A. Matthews, saw the first visible 'quasi-stellar radio source' (quasar).A quasar is ...
17 June
1714: On 17 June 1714, César-François Cassini was born. He was the son of Jacques Cassini and the grandson of Jean Dominique Cassini, one of the people after whom the ...
16 June
1977: On 16 June 1977, Wernher von Braun died.Born in 1912, Dr Wernher von Braun was a German-born engineer who played a prominent role in all aspects of rocketry and ...
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