The early Earth colony ship that carried about two hundred settlers on a nine-year voyage to found the Terra Nova colony, humanity's first deep-space settlement, and was taken apart on arrival to build it.
The SS Conestoga is the ship that carried the first human colonists beyond the Solar system, as told in the Star Trek: Enterprise episode Terra Nova. Launched in 2069 under Captain Mitchell, she took nine years to reach a habitable planet some twenty light years from Earth.
The ship was never meant to return. On arrival in 2078 she was dismantled and her parts used to build the settlement. When Earth later proposed sending a second ship of colonists, the Terra Novans objected angrily, and soon afterwards all contact was lost.
In 2151 Enterprise visits the planet and finds the colony empty. Archer's crew learn that an asteroid impact poisoned the surface and that the children survived underground as the Novans, who blamed humans for the disaster. The fate of the Conestoga's people had been one of the great mysteries of early space flight.