The European Space Agency's Integral spacecraft, functional since its launch in 2002, will cease its observations on February 28. Initially expected to last only 24 months, its mission was extended multiple times, resulting in over two decades of valuable discoveries in gamma-ray astrophysics. Despite encountering operational challenges, Integral tracked significant astronomical phenomena, including gravitational waves. Its contributions have proven greater than anticipated, showcasing its unexpected adaptability and the resilience of its design. Post-observation, engineers will monitor the spacecraft's status until its atmospheric re-entry in 2029.
Integral's mission has lasted far longer than originally planned, initially expected to last only 24 months, extending to 5 years, finally reaching decades in orbit.
Integral was ideal for tasks unforeseen at its conception, such as tracking the sources of gravitational waves and ultrahigh-energy neutrinos detected by ground-based instruments.
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