Outpost Omega-70 was a planet on the border of the Alpha Quadrant where it crossed into the Delta Quadrant. The planet was colonized by the Federation and was used as an advanced listening post to monitor transmissions from the Delta Quadrant.
Prior to Stardate 3519.7 the planet was one of several worlds destroyed by a Borg scout vessel which was enhanced with a device that could cause a forced core implosion. (TOS - New Visions comic: "Resistance")
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