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The Stardust craft, speeding at 24,000 mph, came within 112 miles of the surface of comet Tempel 1 on Monday. The event included live commentary from NASA's Jet Propulsion Laboratory in Pasadena.
Click here for NASA's Date With a Comet video.
Scientists and engineers clapped when they received a signal from Stardust craft that it had snapped six dozen pictures as planned.
It's the first time that a comet has been visited by two different spacecraft.
In 2005, another NASA craft named Deep Impact unleashed a copper bullet that carved a crater on Tempel 1.
Scientists plan to study then-and-now images to look for changes on the surface.
It'll take several hours for all the pictures and other data from the flyby to reach Earth.