Vanguard 1 (Harvard designation: 1958-Beta 2, [3] COSPAR ID: 1958-002B [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 1 (1958 Beta 2) was a small Earth-orbiting satellite designed to test the launch capabilities of a three-stage launch vehicle and the effects of the environment on a satellite and its systems in Earth orbit. It also was used to obtain geodetic measurements through orbit analysis.

2015年3月17日 · Vanguard 1, the world’s first solar-powered satellite, launched on St. Patrick’s Day (March 17) 1958. It was designed to test the launch capabilities of a three-stage launch vehicle and the effects of the environment on a satellite and its systems in Earth orbit.

2017年10月6日 · Conceived by the Naval Research Laboratory (NRL) in 1955, Vanguard was to be America’s first satellite programme. The Vanguard system consisted of a three-stage rocket designed to launch a...

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 1 was the first satellite to have solar electric power.

Spacecraft: Vanguard 1. Vanguard Test Vehicle (TV-1), a modified Martin Viking first-stage and Vanguard solid-propellant third-stage Grand Central Rocket as second-stage, launched with instrumented nose cone to an altitude of 121 miles and met all test objectives..

2020年7月9日 · And though it only blasted off some six months after the Soviet’s Sputnik satellite, Vanuguard 1 still remains in orbit — more than 60 years later. This makes Vanguard Earth’s longest-orbiting...

2018年3月17日 · And with a mass of just 1.47 kilograms, Vanguard 1 would be the smallest satellite until the first 0.7-kilogram USAF Tedrahedral Research Satellites were deployed in orbit in 1963 (see “Vintage Micro: The Original Picosatellite“).

Vanguard 1, launched March 17, 1958, was a tiny 1.47-kg (3.25-pound) sphere equipped with two radio transmitters. It was the second U.S. artificial satellite placed in orbit around Earth, the first being Explorer 1 (January 31, 1958).

2008年3月17日 · HOUSTON - The oldest surviving artificial Earth satellite, Vanguard 1, turned 50 years old on Monday — and continued to turn in its orbit, just as it has done since its launch at the...