Picture of the SpaceX Falcon 9 rocket at Cape Canaveral
A SpaceX Falcon 9 rocket stands ready to boost a Dragon capsule on its fifth resupply mission to the Space Station. If all goes as planned, the rocket will land on a barge on Saturday.

Excerpt from 
news.nationalgeographic.com


SpaceX chief aims to make rockets reusable by guiding them to a barge instead of letting them splash down. 

Rockets have landed on and on Mars, but now SpaceX rocket maven Elon Musk aims to land one someplace really exotic—a barge floating in the Atlantic Ocean.

The barge, or “autonomous spaceport drone ship” as SpaceX calls it, is scheduled to land its returned rocket on Saturday, about 17 minutes after the planned 4:47 a.m. (EST) of a Dragon cargo spacecraft heading to the International Space Station from the Cape Canaveral Air Force Station in Florida.

The point of the barge landing is to recover the rocket’s expensive engines and reuse them. Until now, rocket engines have typically been allowed to burn up on reentry or plummet into the ocean, either for disposal or recovery later by boat. If SpaceX pulls off the barge landing, it will be a first for ocean landings.

The barge’s landing site, just 300 feet by 170 feet in (about 90 by 50 meters), will act as the outfielder’s glove to catch the massive first stage of the Falcon 9 launch rocket, maneuvered into place by remote .

“Our main mission is to get cargo to the space station,” said SpaceX’s Hans Koenigsmann, speaking last week at a NASA briefing. “I’m pretty sure it will be pretty exciting,” he said of the attempted landing of the 14-story-tall first stage of the rocket on a floating platform.

Failure an Option

SpaceX has successfully landed rocket stages on land, and made a controlled landing on water after a past cargo launch, which still led to the loss of the rocket stage in the drink. Musk has previously suggested that barge landings of stages would expedite their reuse, leading to cheaper rocketry.

Musk gave 50 percent odds of the barge landing working out. (“I pretty much made that up. I have no ,” he added in a recent chat on Reddit.)