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Last updated on April 20, 2014 at 19:30 EDT
Every Day is Hollow-een
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Every Day is Hollow-een

February 5, 2014
Release Date: February 5, 2014 Topics: Craters with Bright Material, Hollows, NAC Date acquired: July 05, 2011 Image Mission Elapsed Time (MET): 218374017 Image ID: 466629 Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) Center Latitude: 47.45° Center Longitude: 145.6° E Resolution: 30 meters/pixel Scale: The image is about 31 km (19 mi.) wide Incidence Angle: 48.0° Emission Angle: 5.6° Phase Angle: 53.7° Of Interest: Today's image features the central peak complex of a large, unnamed crater on the plains surrounding the Caloris basin, roughly 400 km (250 mi) northwest of the crater Munch. The image has been stretched to highlight the details of the hollows that are forming on the crests of the peaks. The bright hollows on Mercury stand out in stark contrast to the low reflectance material with which they are frequently associated. This image was acquired as a high-resolution targeted observation. Targeted observations are images of a small area on Mercury's surface at resolutions much higher than the 200-meter/pixel morphology base map. It is not possible to cover all of Mercury's surface at this high resolution, but typically several areas of high scientific interest are imaged in this mode each week. The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. During the first two years of orbital operations, MESSENGER acquired over 150,000 images and extensive other data sets. MESSENGER is capable of continuing orbital operations until early 2015. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington