Vanguard 1, Oldest Manmade Satellite, Turns 60 This Weekend

Conception of Vanguard 1, which remains in Medium Earth Orbit (MEO) after a record-setting 60 years. Image Credit: National Space Science Data Center

These days, artificial satellites are built with longevity in mind. The latest NASA/NOAA Geostationary Operational Environmental Satellite (GOES-S)—launched earlier this month—is expected to remain in active service for up to […]