1181
A supernova is reported to have been seen in the constellation Cassiopeia.
1971
http://www.onthisday.com/events/august/4
NASA launches the first satellite from a manned spacecraft to orbit the moon.
2007
The Mars Lander, Phoenix, was launched from Cape Canaveral.
For a complete list of today’s Space History, see http://www.astronautix.com/a/august04html
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