image: Tyagaraja crater, 97 km in diameter. Bright areas with blue color and etched texture correspond to a high density of hollows (inset). The central pit surrounded by reddish material is probably a pyroclastic vent. From monochrome image EN0212327089M, 111 m/pixel, with enhanced color from the eight-filter set EW0217266882I. This image relates to an article that appeared in the Sept. 30, 2011, issue of Science, published by AAAS. The study, by Dr. D.T. Blewett of Johns Hopkins University Applied Physics Laboratory in Laurel, Md., and colleagues was titled, "Hollows on Mercury: MESSENGER Evidence for Geologically Recent Volatile-Related Activity." view more
Credit: Image courtesy of <i>Science</i>/AAAS