CAPE CANAVERAL, Fla. — Discovery, the world’s most traveled spaceship, left the International Space Station today for the last time, getting a dramatic send-off by the dozen orbiting astronauts as well as “Star Trek’s” original Capt. Kirk.

Station skipper Scott Kelly rang his ship’s bell in true naval tradition, as the shuttle backed away on the final leg of its final journey.

“Discovery departing,” he called out.

Discovery is due back on Earth on Wednesday. It’s being retired after touchdown and sent to the Smithsonian Institution for display.

NASA’s two other shuttles will join Discovery in retirement, following their upcoming missions.

Discovery’s astronauts got a special greeting in advance of their space station departure.