Comet Wild 2 (IMAGE) Washington University in St. Louis Caption Left: Composite image of a long-exposure and short-exposure image of the nucleus of comet Wild 2, showing surface features and jet activity. Right: Close-up view from a different image showing pinnacles, depressions, and ridges on Wild 2. Credit Courtesy: Geochemistry Usage Restrictions For editorial purposes License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.