Publication Date:
2004-12-18
Description:
Neutral oxygen in the saturnian system shows variability, and the total number of oxygen atoms peaks at 4 x 10(34). Saturn's aurora brightens in response to solar-wind forcing, and the auroral spectrum resembles Jupiter's. Phoebe's surface shows variable water-ice content, and the data indicate it originated in the outer solar system. Saturn's rings also show variable water abundance, with the purest ice in the outermost A ring. This radial variation is consistent with initially pure water ice bombarded by meteors, but smaller radial structures may indicate collisional transport and recent renewal events in the past 10(7) to 10(8) years.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Esposito, Larry W -- Colwell, Joshua E -- Larsen, Kristopher -- McClintock, William E -- Stewart, A Ian F -- Hallett, Janet Tew -- Shemansky, Donald E -- Ajello, Joseph M -- Hansen, Candice J -- Hendrix, Amanda R -- West, Robert A -- Keller, H Uwe -- Korth, Axel -- Pryor, Wayne R -- Reulke, Ralf -- Yung, Yuk L -- New York, N.Y. -- Science. 2005 Feb 25;307(5713):1251-5. Epub 2004 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Colorado, Laboratory for Atmospheric and Space Physics, 234 Innovation Drive, Boulder, CO 80303-7814, USA. larry.esposito@lasp.colorado.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604361" target="_blank"〉PubMed〈/a〉
Keywords:
Extraterrestrial Environment
;
*Hydrogen
;
*Ice
;
*Oxygen
;
*Saturn
;
Spacecraft
;
Spectrum Analysis
;
Ultraviolet Rays
;
Water
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
