This Day In Astro History



Supernova

 

April 6

1993 - NASA scientists using the International Ultraviolet Explorer (IUE) find direct evidence that red supergiant stars end their existence in massive explosions known as supernovae. Twelve million light years away, in the galaxy known as M81 the Type II supernova was designated SN 1993J, the tenth supernova of the year. IUE was launched into Earth orbit in January 1978 by a Delta rocket from Cape Canaveral, Fla., in cooperation with the European Space Agency (ESA) and the British Science and Engineering Research Council. Managed by Goddard Space Flight Center with the ESA in Villafranca, Spain.

1965 - maple leafLaunch of Early Bird (Intelsat I), first commercial communication satellite, used by the Canadian Overseas Telecommunications Corporation (Teleglobe Canada in 1975) for transatlantic communications.

1973 - Pioneer 11 launched. This was the spacecraft which made the first direct observations of Saturn (1979) and studied energetic particles in the outer heliosphere. The Pioneer 11 Mission ended on 30 September 1995, when the last transmission from the spacecraft was received. Its electrical power source exhausted, the spacecraft could no longer operate any of its scientific instruments, nor point its antenna toward Earth. The spacecraft is headed toward the constellation of Aquila (The Eagle), Northwest of the constellation of Sagittarius. Pioneer 11 may pass near one of the stars in the constellation in about 4 million years. (NASA)
Pioneer 11 Launch
Pioneer 11 launch
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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene