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  • American Association for the Advancement of Science (AAAS)  (5)
  • Nature Publishing Group (NPG)  (1)
  • 1
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    The global distribution of pure anorthosite on the Moon (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-09-11
    Description: It has been thought that the lunar highland crust was formed by the crystallization and floatation of plagioclase from a global magma ocean, although the actual generation mechanisms are still debated. The composition of the lunar highland crust is therefore important for understanding the formation of such a magma ocean and the subsequent evolution of the Moon. The Multiband Imager on the Selenological and Engineering Explorer (SELENE) has a high spatial resolution of optimized spectral coverage, which should allow a clear view of the composition of the lunar crust. Here we report the global distribution of rocks of high plagioclase abundance (approaching 100 vol.%), using an unambiguous plagioclase absorption band recorded by the SELENE Multiband Imager. If the upper crust indeed consists of nearly 100 vol.% plagioclase, this is significantly higher than previous estimates of 82-92 vol.% (refs 2, 6, 7), providing a valuable constraint on models of lunar magma ocean evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ohtake, Makiko -- Matsunaga, Tsuneo -- Haruyama, Junichi -- Yokota, Yasuhiro -- Morota, Tomokatsu -- Honda, Chikatoshi -- Ogawa, Yoshiko -- Torii, Masaya -- Miyamoto, Hideaki -- Arai, Tomoko -- Hirata, Naru -- Iwasaki, Akira -- Nakamura, Ryosuke -- Hiroi, Takahiro -- Sugihara, Takamitsu -- Takeda, Hiroshi -- Otake, Hisashi -- Pieters, Carle M -- Saiki, Kazuto -- Kitazato, Kohei -- Abe, Masanao -- Asada, Noriaki -- Demura, Hirohide -- Yamaguchi, Yasushi -- Sasaki, Sho -- Kodama, Shinsuke -- Terazono, Junya -- Shirao, Motomaro -- Yamaji, Atsushi -- Minami, Shigeyuki -- Akiyama, Hiroaki -- Josset, Jean-Luc -- England -- Nature. 2009 Sep 10;461(7261):236-40. doi: 10.1038/nature08317.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19741704" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Detailed images of asteroid 25143 Itokawa from Hayabusa (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-06-03
    Description: Rendezvous of the Japanese spacecraft Hayabusa with the near-Earth asteroid 25143 Itokawa took place during the interval September through November 2005. The onboard camera imaged the solid surface of this tiny asteroid (535 meters by 294 meters by 209 meters) with a spatial resolution of 70 centimeters per pixel, revealing diverse surface morphologies. Unlike previously explored asteroids, the surface of Itokawa reveals both rough and smooth terrains. Craters generally show unclear morphologies. Numerous boulders on Itokawa's surface suggest a rubble-pile structure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saito, J -- Miyamoto, H -- Nakamura, R -- Ishiguro, M -- Michikami, T -- Nakamura, A M -- Demura, H -- Sasaki, S -- Hirata, N -- Honda, C -- Yamamoto, A -- Yokota, Y -- Fuse, T -- Yoshida, F -- Tholen, D J -- Gaskell, R W -- Hashimoto, T -- Kubota, T -- Higuchi, Y -- Nakamura, T -- Smith, P -- Hiraoka, K -- Honda, T -- Kobayashi, S -- Furuya, M -- Matsumoto, N -- Nemoto, E -- Yukishita, A -- Kitazato, K -- Dermawan, B -- Sogame, A -- Terazono, J -- Shinohara, C -- Akiyama, H -- New York, N.Y. -- Science. 2006 Jun 2;312(5778):1341-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hayabusa Project Team, Institute of Space and Astronautical Sciences (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan. saitoj@planeta.sci.isas.jaxa.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16741110" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Lack of exposed ice inside lunar south pole Shackleton Crater (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-10-25
    Description: The inside of Shackleton Crater at the lunar south pole is permanently shadowed; it has been inferred to hold water-ice deposits. The Terrain Camera (TC), a 10-meter-resolution stereo camera onboard the Selenological and Engineering Explorer (SELENE) spacecraft, succeeded in imaging the inside of the crater, which was faintly lit by sunlight scattered from the upper inner wall near the rim. The estimated temperature of the crater floor, based on the crater shape model derived from the TC data, is less than approximately 90 kelvin, cold enough to hold water-ice. However, at the TC's spatial resolution, the derived albedo indicates that exposed relatively pure water-ice deposits are not on the crater floor. Water-ice may be disseminated and mixed with soil over a small percentage of the area or may not exist at all.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haruyama, Junichi -- Ohtake, Makiko -- Matsunaga, Tsuneo -- Morota, Tomokatsu -- Honda, Chikatoshi -- Yokota, Yasuhiro -- Pieters, Carle M -- Hara, Seiichi -- Hioki, Kazuyuki -- Saiki, Kazuto -- Miyamoto, Hideaki -- Iwasaki, Akira -- Abe, Masanao -- Ogawa, Yoshiko -- Takeda, Hiroshi -- Shirao, Motomaro -- Yamaji, Atsushi -- Josset, Jean-Luc -- New York, N.Y. -- Science. 2008 Nov 7;322(5903):938-9. doi: 10.1126/science.1164020. Epub 2008 Oct 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Kanagawa 229-85105, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18948501" target="_blank"〉PubMed〈/a〉
    Keywords: Cold Temperature ; Extraterrestrial Environment ; *Ice ; *Moon ; Spacecraft
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Long-lived volcanism on the lunar farside revealed by SELENE Terrain Camera (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-08
    Description: We determined model ages of mare deposits on the farside of the Moon on the basis of the crater frequency distributions in 10-meter-resolution images obtained by the Terrain Camera on SELENE (Selenological and Engineering Explorer) (Kaguya). Most mare volcanism that formed mare deposits on the lunar farside ceased at approximately 3.0 billion years ago, suggesting that mare volcanism on the Moon was markedly reduced globally during this period. However, several mare deposits at various locations on the lunar farside also show a much younger age, clustering at approximately 2.5 billion years ago. These young ages indicate that mare volcanism on the lunar farside lasted longer than was previously considered and may have occurred episodically.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haruyama, Junichi -- Ohtake, Makiko -- Matsunaga, Tsuneo -- Morota, Tomokatsu -- Honda, Chikatoshi -- Yokota, Yasuhiro -- Abe, Masanao -- Ogawa, Yoshiko -- Miyamoto, Hideaki -- Iwasaki, Akira -- Pieters, Carle M -- Asada, Noriaki -- Demura, Hirohide -- Hirata, Naru -- Terazono, Junya -- Sasaki, Sho -- Saiki, Kazuto -- Yamaji, Atsushi -- Torii, Masaya -- Josset, Jean-Luc -- New York, N.Y. -- Science. 2009 Feb 13;323(5916):905-8. doi: 10.1126/science.1163382. Epub 2008 Nov 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan. haruyama.junichi@jaxa.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18988811" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multi-color images of Ryugu. Geomorphological features present include a circum-equatorial ridge, east/west dichotomy, high boulder abundances across the entire surface, and impact craters. Age estimates from the craters indicate a resurfacing age of 〈f〉〈/f〉 years for the top 1-meter layer. Ryugu is among the darkest known bodies in the Solar System. The high abundance and spectral properties of boulders are consistent with moderately dehydrated materials, analogous to thermally metamorphosed meteorites found on Earth. The general uniformity in color across Ryugu’s surface supports partial dehydration due to internal heating of the asteroid’s parent body.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2019
    Description: 〈p〉The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multicolor images of Ryugu. Geomorphological features present include a circum-equatorial ridge, east-west dichotomy, high boulder abundances across the entire surface, and impact craters. Age estimates from the craters indicate a resurfacing age of 〈f〉〈/f〉 years for the top 1-meter layer. Ryugu is among the darkest known bodies in the Solar System. The high abundance and spectral properties of boulders are consistent with moderately dehydrated materials, analogous to thermally metamorphosed meteorites found on Earth. The general uniformity in color across Ryugu’s surface supports partial dehydration due to internal heating of the asteroid’s parent body.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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