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Image Caption: Simplesat over Lake Michigan
With Lake Michigan as a backdrop, this north-looking view shows the recently deployed small sciences satellite called Simplesat (dark rectangular object near the center of the image). Simplesat is an engineering satellite designed to evaluate the use of inexpensive commercial hardware for spacecraft. The satellite was spring-ejected from a canister at the rear of the Shuttle's cargo bay. Lake Michigan is the second deepest and third largest of the five Great Lakes. Lake Michigan is 307 miles (494 km) long and is the only Great Lake wholly within the United States. Cloud free Lake Superior, the largest and deepest of the Great Lakes, is discernible just below the horizon at the top center of the image.