coondoggie writes NASA is working on some difficult renovations to reinvigorate its 70-meter-wide ‘Mars antenna.’ The antenna, a key cog in NASA’s Deep Space Network, needs about $1.25M worth of what NASA calls major, delicate surgery. The revamp calls for lifting the antenna — about 4 million kilograms of finely tuned scientific instruments — to a height of about 5 millimeters so workers can replace the steel runner, walls and supporting grout.”

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