Jun 9 1961
From The Space Library
NASA press conference revealed that data from Vanguard III (during November 15-17, 1960) and Explorer VIII (also during November 1960) indicated that high-velocity clouds of micrometeorites moved near the Earth, perhaps in a meteor stream around the Sun. This new data was just revealed from completed analysis.
Echo I completed its 3,697th orbit after 9 months. When this first passive communications "balloon satellite" was launched on August 12, 1960, it was not expected to have a long life span.
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