Vanguard | Vanguard
Launch Failure
L - -- : -- : -- : --
Instantaneous launch window.
Launch Window
June 22, 1959, 8:16 p.m. - June 22, 1959, 8:16 p.m.
Instantaneous launch window.
June 22, 1959, 8:16 p.m. - June 22, 1959, 8:16 p.m.
Vanguard is a scientific satellite to measure the Earth's magnetic field, solar X-ray radiation and its effects on the Earth's atmosphere and the near-Earth micrometeoroid environment.
The Vanguard rocket was intended to be the first launch vehicle the United States would use to place a satellite into orbit. Instead, the Sputnik crisis caused by the surprise launch of Sputnik 1 led the U.S., after the failure of Vanguard TV3, to quickly orbit the Explorer 1 satellite using a Juno I rocket, making Vanguard I the second successful U.S. orbital launch.
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