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Old NASA satellite falling from sky this weekend

A 38-year-old retired NASA satellite is about to fall from the sky. Most of the 5,400-pound (2,450-kilogram) satellite will burn up upon reentry, according to NASA. The science satellite is expected to come down Sunday night, give or take 17 hours, according to the Defense Department. The California-based Aerospace Corp, however, is targeting Monday morning, give or take 13 hours, along a track passing over Africa, Asia, the Middle East and the westernmost areas of North and South America.