Comets, solar wind and the D/H ratio
نویسندگان
چکیده
منابع مشابه
Interaction of the solar wind with comets: a Rosetta perspective
The Rosetta mission provides an unprecedented possibility to study the interaction of comets with the solar wind. As the spacecraft accompanies comet 67P/Churyumov-Gerasimenko from its very low-activity stage through its perihelion phase, the physics of mass loading is witnessed for various activity levels of the nucleus. While observations at other comets provided snapshots of the interaction ...
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© 2008 American Institute of Physics, S-0031-9228-0806-010-9 Active comets are fascinating ephemeral bodies that have both thrilled and terrified people for millennia. As a bonus, when Earth passes through a comet’s debris trail, we see a dazzling meteor shower. The phenomena of comets are spectacular, but what they can tell us about the early solar system is extraordinary. Comets are the best-...
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We review the evidence for buried ice in the asteroid belt; specifically the questions around the so-called Main Belt Comets (MBCs). We summarise the evidence for water throughout the Solar System, and describe the various methods for detecting it, including remote sensing from ultraviolet to radio wavelengths. We review progress in the first decade of study of MBCs, including observations, mod...
متن کاملAnomalous nitrogen isotope ratio in comets.
High-resolution spectra of the CN B2 summation operator +-X2 summation operator + (0,0) band at 390 nanometers yield isotopic ratios for comets C/1995 O1 (Hale-Bopp) and C/2000 WM1 (LINEAR) as follows: 165 +/- 40 and 115 +/- 20 for 12C/13C, 140 +/- 35 and 140 +/- 30 for 14N/15N. Our N isotopic measurements are lower than the terrestrial 14N/15N = 272 and the ratio for Hale-Bopp from measurement...
متن کاملThe Solar Wind
. ~ydrodyn~mic expansion of the solar corona is the basis for "solar corpusc ular radiatIOn . The qUiet day coronal temperatures of 1 to 2X 106 OK yield a solar wind of several h';lDdred km/sec and a density of 5 to 50 particles/cm3 at the orbit of Earth. The solar ~lVllld draws out m to spa~e t he. lines of fore.e of t he gen eral one-gauss solar field, to give an Il1terplanetary fi eld t hat ...
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ژورنال
عنوان ژورنال: Nature
سال: 1974
ISSN: 0028-0836,1476-4687
DOI: 10.1038/248398a0