Image from NASA's Wide-field Infrared Survey Explorer (WISE) features comet 65P/Gunn. Comet 65P/Gunn's tail is seen here in red trailing off to the right of the comet's nucleus. The comet was discovered by James Gunn of Princeton University, in 1970. WISE observed the comet on April 24, 2010, in the constellation Capricornus. This is a single-frame observation, covering an area of 1.5 by 1.5 full moons (0.76 by 0.76 degrees). Comet 65P/Gunn is what is called a short-period comet. It orbits the sun inside the main asteroid belt between the orbits of the planets Mars and Jupiter. The orbit of 65P/Gunn is relatively round compared to many comets, and it takes 6.79 years to complete one trip around the sun. WISE sees invisible infrared light, and all four infrared detectors aboard WISE were used to make this image. The colors are representational. In this image, 3.4-micron light is colored blue; 4.6-micron light is green; 12-micron light is orange; and 22-micron light is red. Bluer objects in this image are warmer in temperature, such as stars, while cooler objects, such as asteroids and the comet, are redder in appearance.