As private spaceflight is ramping up, at least in the US, NASA still has a lot of control over what launches happen, and when. Between the position of the planets, the nature of a mission, and possible hazardous weather, there may only be a brief safe launch window for a mission every few months, or even years. Read our full story on Engadget: Get More Engadget: • Like us on Facebook: • Follow us on Twitter: • Follow us on Instagram: • Read more: