Cosmos class

The Cosmos-class was a Federation explorer class starship which began development in 2379. (🇸🇹)

Developement
While the USS Voyager (NCC-74656) was in the Delta Quadrant, the crew discovered a new type of propulsion technology dubbed the Quantum slipstream drive. Starfleet Command, in agreement with the Federation Council, concluded that a new class of starship. Hence the Cosmos-class starship; Similar in size of two starship.

Testing
In 2380, Admiral Hayes was aboard the USS Guanine (NX-88708), the Cosmos-class prototype, when there was a malfunction during the ship's Quantum slipstream drive testing trials. Commander Taylor Ferguson, the ship's executive officer, Admiral Hayes, and the entire engineering crew died in the explosion. ("The Teacher")

Starships

 * USS Guanine (NX-88708)
 * USS Cosmos (NX-80819)