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At Launch Pad 17-A, Cape Canaveral Air Station, a worker (left) runs a wire through a mounting hole on the second stage of a Boeing Delta II rocket in order to affix an external video camera held by the worker at right. The Delta II will launch the Stardust spacecraft on Feb. 6. Looking toward Earth, the camera will record the liftoff and separation of the first stage. Stardust is destined for a close encounter with the comet Wild 2 in January 2004. Using a silicon-based substance called aerogel, Stardust will capture comet particles flying off the nucleus of the comet. The spacecraft also wil…