Nasa announces Artemis III mission no longer aims to send humans to moon

· · 来源:tutorial资讯

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.

本月初,美股软件板块在经历了一阵暴跌后开始反弹,但其涨幅不足以扭转华尔街的担忧——企业软件是否正面临被AI颠覆。这种担忧让投资者用脚投票,ServiceNow、Adobe、Workday等老牌软件企业,其股价已经跌落至十年以来的最低水平。

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