本帖最后由 叶程婉 于 2011-3-31 23:04 编辑
来自约翰霍普金斯大学应用物理实验室信使号官网
http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?gallery_id=2&image_id=432
| Release Date: March 29, 2011 | | Topics: WAC |
Date acquired: March 29, 2011
Image Mission Elapsed Time (MET): 209877871
Image ID: 65056
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -53.3°
Center Longitude: 13.0° E
Resolution: 2.7 kilometers/pixel (1.7 miles/pixel)
Scale: Debussy has a diameter of 80 kilometers (50 miles)
Of Interest: Early this morning, at 5:20 am EDT, MESSENGER captured this historic image of Mercury. This image is the first ever obtained from a spacecraft in orbit about the Solar System's innermost planet. Over the subsequent six hours, MESSENGER acquired an additional 363 images before downlinking some of the data to Earth. The MESSENGER team is currently looking over the newly returned data, which are still continuing to come down. Tomorrow, March 30, at 2 pm EDT, attend the NASA media telecon to view more images from MESSENGER's first look at Mercury from orbit.
The dominant rayed crater in the upper portion of the image is Debussy. The smaller crater Matabei with its unusual dark rays is visible to the west of Debussy. The bottom portion of this image is near Mercury's south pole and includes a region of Mercury's surface not previously seen by spacecraft. Compare this image to the planned image footprint to see the region of newly imaged terrain, south of Debussy. Over the next three days, MESSENGER will acquire 1185 additional images in support of MDIS commissioning-phase activities. The year-long primary science phase of the mission will begin on April 4, and the orbital observation plan calls for MDIS to acquire more than 75,000 images in support of MESSENGER's science goals.
On March 17, 2011 (March 18, 2011, UTC), MESSENGER became the first spacecraft to orbit the planet Mercury. The mission is currently in its commissioning phase, during which spacecraft and instrument performance are verified through a series of specially designed checkout activities. In the course of the one-year primary mission, the spacecraft's seven scientific instruments and radio science investigation will unravel the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the science questions that the MESSENGER mission has set out to answer. |
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Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington |
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