Comet Wild 2 - Stardust Approach Image
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ Jan. 6, 2004
This image was taken during the close approach phase of Stardust's Jan 2, 2004 flyby of comet Wild 2. It is a distant side view of the roughly spherical comet nucleus. One hemisphere is in sunlight and the other is in shadow analogous to a view of the quarter moon. Several large depressed regions can be seen. Comet Wild 2 is about five kilometers (3.1 miles) in diameter.