Memory Alpha
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Memory Alpha
Delphic Expanse sphere map

Captain Archer surveys a map of the gravimetric waves permeating the Delphic Expanse.

A gravimetric wave is an anomoly which occurs in areas of high gravimetric energy.

At least 1,000 years prior to the 22nd century, a race of transdimensional beings constructed a series of massive spheres, each one of which generated massive amounts of gravimetric energy. Powerful spatial anomalies existed wherever the gravimetric waves intersected, constituting an area of space known as the Delphic Expanse. (ENT: "Anomaly", "Exile")

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