Vanguard 3
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Vanguard 3 is a scientific satellite that was launched into Earth orbit by the Vanguard SLV-7 on 18 September 1959, the third successful Vanguard launch out of eleven attempts. Vanguard rocket: Vangua
Vanguard 3 satellite
Launch of Vanguard 3 on Vanguard SLV-7 rocket
Vanguard 1
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Vanguard 1 is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched, following Sputnik 1, Sputnik 2, and Explorer 1. It was launched 17 March 1958.
Vanguard 3
…became derelict objects. Vanguard 3 remains in orbit. The pieces of the upper stage re-entered the atmosphere on 3 April 2014 and 4 February 2015. As Vanguard 1, Vanguard 2, and Vanguard 3 are still orbiting with their drag properties essentially unchanged, they form a baseline data set on the atmosphere of…
A model of Vanguard 1
The Vanguard 1 upper stage imaged on 25 April 2026 with the 40.2-cm MISO telescope of Delft University of Technology