Academic Journal
The root of anomalously specular reflections from solid surfaces on Saturn’s moon Titan
| العنوان: | The root of anomalously specular reflections from solid surfaces on Saturn’s moon Titan |
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| المؤلفون: | Hofgartner, Jason D., Hayes, Alexander G., Campbell, Donald B., Lunine, Jonathan I., Black, Gregory J., Mackenzie, Shannon M., Birch, Samuel P. D., Elachi, Charles, Kirk, Randolph D., Le Gall, Alice, Lorenz, Ralph D., Wall, Stephen D. |
| المساهمون: | Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Astronomy Ithaca, Cornell University New York, Department of Astronomy Charlottesville, University of Virginia, Johns Hopkins University Applied Physics Laboratory Laurel, MD (APL), Caltech Division of Geological and Planetary Sciences, California Institute of Technology (CALTECH), Astrogeology Science Center Flagstaff, United States Geological Survey Reston (USGS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) |
| المصدر: | ISSN: 2041-1723. |
| بيانات النشر: | HAL CCSD Nature Publishing Group |
| سنة النشر: | 2020 |
| المجموعة: | Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| مصطلحات موضوعية: | [SDU]Sciences of the Universe [physics] |
| الوصف: | International audience ; Saturn’s moon Titan has a methane cycle with clouds, rain, rivers, lakes, and seas; it is the only world known to presently have a volatile cycle akin to Earth’s tropospheric water cycle. Anomalously specular radar reflections (ASRR) from Titan’s tropical region were observed with the Arecibo Observatory (AO) and Green Bank Telescope (GBT) and interpreted as evidence for liquid surfaces. The Cassini spacecraft discovered lakes/seas on Titan, however, it did not observe lakes/seas at the AO/GBT anomalously specular locations. A satisfactory explanation for the ASRR has been elusive for more than a decade. Here we show that the ASRR originate from one terrain unit, likely paleolakes/paleoseas. Titan observations provide ground-truth in the search for oceans on exoearths and an important lesson is that identifying liquid surfaces by specular reflections requires a stringent definition of specular; we propose a definition for this purpose. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1038/s41467-020-16663-1 |
| الاتاحة: | https://insu.hal.science/insu-02876602 https://insu.hal.science/insu-02876602v1/document https://insu.hal.science/insu-02876602v1/file/s41467-020-16663-1.pdf https://doi.org/10.1038/s41467-020-16663-1 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.D802E266 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/s41467-020-16663-1 |
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