Argus Array
The Argus Array (full name: Argus Subspace Radio Telescope Array) was a Federation subspace telescope located in the Alpha Quadrant near the Gamma Trianguli, Alpha Majoris, Talos, and Setlik systems. In the 2360s, it was positioned at the edge of Federation space, three light years from Cardassian territory.

The Argus Array had been in service with Starfleet since at least 2259. That year, the location of this subspace telescope was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. ()

An unmanned structure, the Argus Array consisted of eighteen hexagonal subspace antennae clusters, each powered by an individual fusion reactor and all regulated from a central computer. It was capable of collecting detailed images of objects many light years away. ()

During one of its studies of subspace, the Argus Array suggested an upper bound on a phenomenon known as the Hofstadter effect. ( display graphic)

The Argus Array malfunctioned in 2367, following contact with a Cytherian probe, which disrupted the Array's computer systems. The problem was fixed by the . ()

In different quantum realities, the Enterprise-D returned to the Argus Array in 2370 to investigate why it was not transmitting data. In these parallel universes visited by Lieutenant Worf, the cause of the array's shutdown was varied. In one, the Cardassians had reprogrammed the array to spy on Federation outposts; in another, it had suffered a simple mechanical failure. In one universe, the Cardassians had destroyed the array; in another, the Bajorans did so. ()

In 2399, the location of the Argus Array in neutral space was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. ()

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Space stations
Sensor technology