But there’s also important news in a surprise announcement from SpaceX, the private company headed by Elon Musk, which designed and built the rocket and spacecraft for the re-supply flight. The launch, scheduled for just before 5pm US Eastern time Monday, will also serve as a test of the company’s reusable rocket. After the robotic Dragon spacecraft is launched toward its rendezvous with the ISS in orbit, the Falcon rocket that sent it on its way won’t just tumble into the Atlantic ocean: It will attempt to deploy four landing legs and use thrusters to control its descent, something like this but over water:
SpaceX says that the test has a 30% to 40% probability of success, so it could all go pear-shaped. But the engineers there hope that the data collected during the attempt at a controlled descent will help them to refine their approach to building a more efficient launch vehicle. As we’ve written before, making a rocket reusable is something of a holy grail for Musk and SpaceX: While the rockets cost $54 million, their fuel costs only $200,000, so making most of the rocket reusable would save tens of millions of dollars and allow the fledgling rocket company—which already seeks to undercut its competitors on price—to dominate the putting-things-in-space business.
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