After 22 months without a trace, NASA has found one of its Solar Terrestrial Relations Observatories, known as STEREO-B.
The spacecraft, which went missing in October of 2014, was found using NASA’s Deep Space Network, which tracks all of its missions in space. The goal of STEREO-B, and its partner, STEREO-A, was to study the sun and space weather.
NASA says it lost communication with STEREO-B when they were testing its command loss timer, which triggers a hard reset of the craft when it goes without communication with the Earth for 72 hours.
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