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Dream Chaser's first ISS resupply mission launches in late 2020

It'll ferry space station cargo and host science experiments.
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Sierra Nevada Corporation

After years of testing, Sierra Nevada's Dream Chaser cargo spacecraft has a launch window. NASA has given the go-ahead to the vehicle's first mission, which is now slated for late 2020. Appropriately, it's a straightforward resupply trip for the International Space Station. The company received the all-clear after hitting a slew of key NASA-approved design milestones.

Out of the companies NASA picked to provide ISS resupply missions back in 2016, Sierra Nevada's vessel is the only aircraft-like design of the bunch -- the Orbital ATK and SpaceX offerings are capsules. That should give it an edge when it carries scientific experiments, as it can land on a runway and offload equipment immediately (crucial for time-sensitive science) instead of waiting for a recovery. There's a pressurized cabin for human-tended experiments.

Dream Chaser might not serve its original purpose for long when the ISS isn't poised to receive funding past 2024. Even so, it should help usher in the private spaceflight era and offer some fresh competition.

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