SpaceX successfully launches and lands a used rocket for the second time

SpaceX has successfully launched and landed a recycled Falcon 9 rocket for the second time. The rocket’s first stage — the 14-story-tall core that houses the fuel and the rocket’s main engines — touched down on one of the company’s autonomous drone ships in the Atlantic Ocean shortly after taking off from a launchpad at nearby Cape Canaveral, Florida. It’s the 12th time SpaceX has successfully landed one of these rocket stages, and the seventh time it’s performed the feat at sea.

This particular rocket previously flew in January, when it was used to put 10 satellites into orbit for communications company Iridium. The rocket then landed on a drone ship in the Pacific Ocean. SpaceX retrieved the rocket and spent the next few months refurbishing it in preparation for today’s launch.

The landing wasn’t easy, though. Because the rocket had to push BulgariaSat-1 to such a high orbit, the first stage experienced more force and heat during reentry than any other Falcon 9, according to a tweet from SpaceX CEO Elon Musk. Musk even warned that there was a “good chance [the] rocket booster doesn’t make it back.”

Shortly after the landing, though, Musk returned to Twitter to add that the rocket booster used “almost all of the emergency crush core,” which helps soften the landing.

Being able to reuse parts of the Falcon 9 rocket has long been a goal for Musk. He’s been trying to get the company to a point where it can reuse things like the rocket’s main stage, or the payload fairing (the cone at the top) instead of building a new rocket for each new launch. Reusing rockets is a great way to bring down launch costs; building them from scratch costs millions of dollars.

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It’s only this year that SpaceX has been able to pull any of this off. The company launched and landed a reused Falcon 9 for the first time back in March, and it also recovered that rocket’s fairing — a first for the company. Then, earlier this month, SpaceX sent a used Dragon cargo capsule back to space for the first time ever.

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