The test flight of Carl Sagan's LightSail craft is in jeopardy after a computer problem left it unable to communicate with its mission controllers. According to the Planetary Society, the hardware was launched into space with an older version of its Linux-based operating system, which shipped with a serious glitch. As the vehicle circuits the planet, it's meant to send back a packet of data, but over the first two days, this file grew too big for the system to handle. As such, it crashed, although we mean that in the software sense, rather than the coming-back-to-Earth-with-a-bump sense.
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