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Inside the launch tower at Pad 17-A, Cape Canaveral Air Station, workers guide the Stardust spacecraft toward an opening to a Boeing Delta II rocket below. The spacecraft is already connected to the third stage of the rocket that will be mated with the second stage in preparation for liftoff on Feb. 6. 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 will bring back samples of interstellar dust. These materials consist o…
