SpaceX has succeeded in re-launching one of its Falcon 9 rockets for the first time ever, an undertaking that saw the first ever reflight of an entire orbital class rocket ever, by anyone. The achievement is a key ingredient in SpaceX’s long-term business plan for making rocket launches more affordable and accessible to corporate and government customers, fundamentally changing the economics of spaceflight in ways that pave the way for more ambitious projects, including an eventual trip to Mars.
This rocket was first used last year, when it was the first Falcon 9 rocket to successfully land on one of SpaceX’s autonomous drone ships at sea. That happened in April, during the CRS-8 mission, a resupply mission for the International Space Station. It’s since undergone a barrage of testing to ensure it’s ready to successfully fly again.

“We’re not one-way trip to Mars people, we …