Nasa's defunct 6.5 Ton Junk Satelite to fall on Earth on Friday but where exactly it will fall, no one knows, even with last-minute updates from NASA and US Strategic Command pinpointing the Upper Atmosphere Research (UARS) satellite will begin its final plunge into the Earth's atmosphere.
The reentry is expected to occur between 11 a.m. PT and 3 p.m. PT on Friday 23 Sept 11.
The 6.3-ton UARS, launched from the space shuttle Discovery in 1991 and decommissioned in 2005, is expected to fall back into the dense lower atmosphere sometime on Friday.
The bus-size spacecraft will tumble, break apart and mostly burn up on the way down. But a Nasa analysis using software designed to evaluate satellite decays indicates 26 chunks of debris, the largest weighing 330 pounds or so, likely will survive atmospheric friction to hit the ground somewhere along a 500-mile track downrange of the entry point.
