USS Constellation (NCC-1017) was a Constitution-class heavy cruiser active in the 23rd century. (TOS: "The Doomsday Machine"; Star Fleet Technical Manual)

Two fan Treknology sources — the Heavy Cruiser Evolution Blueprints and Ships of the Star Fleet — posited that Constellation had been refit from a Horizon-class vessel, hence the relatively low NCC number.

One of Constellation's commanding officers prior to Matthew Decker was Ran Armstrong. (TOS novel: Dreadnought!)

Mikhail Manescu was a former chief engineer of the Constellation. After her destruction, Montgomery Scott sent Manescu a letter commiserating with him on the loss. (Star Trek II Biographies)

Rebecca Gallaudet, later commander of the first starship to encounter the Tzenkethi, was a navigator and junior science officer on Constellation in the early 2260s. (Star Trek: Shadowstar Station: "Blindspot")

Under Commodore Decker's command, Constellation discovered the meta-genome in the Taurus Reach in 2263. (Star Trek: Vanguard novel: Harbinger)

Four years later, on stardate 4202.1, Constellation investigated the destruction of solar systems L-370 and L-374. The ship was subsequently attacked by the so-called planet killer and heavily damaged. Commodore Decker beamed his crew down to planet L-374 III, while he remained aboard. The planet killer's next attack took out the ship's transporters, stranding the crew while it destroyed the planet.

The Constellation was left adrift. Discovered by the USS Enterprise, it was detonated inside the planet killer, rendering the weapon inert. (TOS: "The Doomsday Machine")

The Constellation, adrift

However this detonation caused the chronitons within the weapon to become active and sent the device back in time to 2254 where it destroyed Enterprise, creating an alternate timeline, a series of destructive battles known as the Doomsday War. (STNV: "In Harm's Way")

Another Constitution-class heavy cruiser would be named Constellation (and given the same registry number); her commander was Captain Mike Walsh. (TOS novel: My Enemy, My Ally)

In the early 2280s, the second Constellation, under the command of Captain Carmen Ikeya, would be destroyed when the star Achernar went nova. (TOS novel: Time for Yesterday)

Alternate realities[edit | edit source]

The USS Constellation was heavily damaged in a fire fight with three Klingon Battle cruisers. The Constellation was found by Captain James T. Kirk, who boards her with a landing party only to discover that the entire crew has been killed by the Klingons -including her Captain, Commodore Decker. After retrieving all pertinent information Kirk orders the Constellation to self destruct in order to prevent it from falling into the hands of the Klingons. (Star Trek: Counter Worlds)

In One Reality. the USS Constellation (NCC-1017) Was originally a Bonaventure Class Starship Launched in the 2200s and Fought in the "Klingon Repulsion" in the 2220s. in 2243 Starfleet Overhauled the Old Vessel to "Experimental Specifications". It was Then Given the Registry NCC-1710 and Relaunched in 2246 as one of the First Constitution class Vessels Launched. It was eventually Destroyed in 2266 By the Planet Killer. The Replacement USS Constellation (NCC-1710) II Launched in 2267.

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