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Robert J. Mackey, Jr. and Arthur B. Crawford

AUGUST 12, 2015

Echo 1, the world’s first communication satellite, was launched Aug. 12, 1960. Echo 1 was a passive satellite, meaning it did not receive, amplify, and transmit signals electronically, it merely reflected them. It could do so because it was a giant ball of...

Scientist of the Day - Robert J. Mackey, Jr. and Arthur B. Crawford