Astronomy Picture of the Day . ... Credit: STARDUST Team , JPL , NASA Explanation: Dynamic jets of gas and dust surround one of the most active planetary surfaces in the solar system in this wild-looking picture of a comet nucleus . The comet's designation is 81P/Wild 2 of course (sounds like "vilt 2"), and the picture is a composite of two images recorded by the Stardust spacecraft's navigation camera during its January 2nd flyby . ... Comet Holmes Over Hungary . A Tale of Comet Holmes . ...