15 December 2006
Vol 314, Issue 5806

About The Cover

Cover image expansion

COVER A large particle of comet dust collected by the NASA Stardust mission generated a carrot-shaped track in a 3-cm-deep silica tile as it was captured. Like the thousands of other particles returned by the mission, this one decelerated from high speed inside the silica aerogel. See the special section beginning on page 1707. Image: NASA Stardust Team