Comet Wild 2's Heart
NASA's Stardust spacecraft captured this image of comet Wild 2's nucleus as it flew past on Jan. 2, 2004.
Date: 2 Jan 2004
It is one of the clearest images of a comet nucleus ever taken. The image on the right shows bright jets of dust and gas erupting from the nucleus, which is roughly 5.5 km (3.5 miles) in diameter.
Image Credit: NASA
Credit: Jet Propulsion Laboratory