page_title: Vanguard 3
hierarchical_section_title: Vanguard 3
caption_attribution_description: Sketch of the successful Vanguard III satellite
context_page_description: Vanguard 3 is a scientific satellite that was launched into Earth orbit by a Vanguard rocket SLV-7 on September 18, 1959, the third successful Vanguard launch out of eleven attempts. Vanguard rocket: Vanguard Satellite Launch Vehicle 7 was an unused Vanguard TV-4BU rocket, updated to the final production Satellite Launch Vehicle.
  Project Vanguard was a program managed by the United States Naval Research Laboratory, and designed and built by the Glenn L. Martin Company, which intended to launch the first artificial satellite into Earth orbit using a Vanguard rocket. as the launch vehicle from Cape Canaveral Missile Annex, Florida. Vanguard 3 was an important part of the space race between the US and the Soviet Union.
context_section_description: Vanguard 3 (international designation 1959 Eta 1) is a scientific satellite that was launched into Earth orbit by a Vanguard rocket SLV-7 on September 18, 1959, the third successful Vanguard launch out of eleven attempts. Vanguard rocket: Vanguard Satellite Launch Vehicle 7 (SLV-7) was an unused Vanguard TV-4BU (TV-4BU = Test Vehicle-Four BackUp) rocket, updated to the final production Satellite Launch Vehicle (SLV).
  Project Vanguard was a program managed by the United States Naval Research Laboratory (NRL), and designed and built by the Glenn L. Martin Company (now Lockheed-Martin), which intended to launch the first artificial satellite into Earth orbit using a Vanguard rocket. as the launch vehicle from Cape Canaveral Missile Annex, Florida. Vanguard 3 was an important part of the space race between the US and the Soviet Union.
caption: Vanguard 3 satellite sketch
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