Фото: U.S. Navy photo by Mass Communication Specialist 2nd Class Jackson Adkins / Wikimedia
The ratings for Donald Trump's State of the Union address are out, and it looks like the public found it just as long and rambly as the late night hosts did.，更多细节参见safew官方版本下载
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Mostly. This is because, theoretically, we could still save the ISS and move it into higher orbit. NASA has calculated that propelling the station more than 640 kilometers above Earth would keep it alive for 100 years—and also require at least 18.9 metric tons of propellant. That’s roughly 2,000 airline carry-ons. A thousand years would require at least 36 metric tons. If that doesn’t seem like very much, consider the fact that, right now, no vehicle can transport that amount of gas to the station. The still-in-development SpaceX megarocket Starship might be able to haul a significant percentage, but it would struggle to dock with the station, according to the space agency’s estimations.，这一点在同城约会中也有详细论述
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