Robotic exploration missions provide vast amounts of data to help NASA prepare for future human exploration and learn more about the universe. Research Objective: The Lunar Reconnaissance Orbiter Camera (LROC) aims to measure robotic and human sample sites on the moon. Description: While a series of LROC Wide Angle Camera calibration images of the Earth were being acquired, the Narrow Angle Cameras (NAC) were used to capture this spectacular Earth view. This image is actually a mosaic consisting of 16 million pixels, with a pixel scale size of about 3.7 km. Time Frame: The image was acquired on June 12, 2010. Application: This image of Earth is used to calibrate light measurements so that scientists can accurately interpret LROC images of the moon. Learn more: About this image and why calibrations are needed About LRO Download PowerPoint file