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Today in History: Vanguard 2 launches as first weather satellite

2/17/2026

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Summary

Story summary

On February 17, 1959, the United States launched Vanguard 2, the first weather satellite, aboard a Vanguard SLV-4 rocket. Designed to measure cloud cover and atmospheric density, it operated for 19 days and marked a significant achievement in the Space Race. Vanguard 2 continues to orbit Earth, contributing to meteorological studies.

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Story summary

On February 17, 1959, the United States launched Vanguard 2, the first weather satellite, aboard a Vanguard SLV-4 rocket. Designed to measure cloud cover and atmospheric density, it operated for 19 days and marked a significant achievement in the Space Race. Vanguard 2 continues to orbit Earth, contributing to meteorological studies.