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🇺🇸 3/17 - Vanguard 1, the oldest human-made object in orbit, was successfully launched

Vanguard 1 is still in orbit, although communication was lost.

• Name: Vanguard TV-4
• Spacecraft: Vanguard 1
• Mission: Earth Science
• Last contact: May 1964

Vanguard 1 is an American satellite that was an artificial Earth-orbiting satellite. It was the first satellite to have solar electric power. Although communications with the satellite were lost in 1964, it remains the oldest human-made object still in orbit, together with the upper stage of its launch vehicle.

Vanguard 1 was designed to test the launch capabilities of a three-stage launch vehicle as a part of Project Vanguard, and the effects of the space environment on a satellite and its systems in Earth orbit. It also was used to obtain geodetic measurements through orbit analysis. Vanguard 1 was described by the Soviet Premier, Nikita Khrushchev, as "the grapefruit satellite.

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