-Caveat Lector- Saturday December 16 10:20 PM ET Jupiter Moon May Have a Salt-Water Ocean SAN FRANCISCO (Reuters) - Scientists studying data sent back to Earth from NASA's Galileo spacecraft have concluded that Jupiter's largest moon, Ganymede, may possess a huge salt-water ocean beneath its crusty surface. Galileo probe data on two other Jovian moons -- Europa and Callisto -- has already indicated that they probably have subsurface Water, a key building block for life. Now, Ganymede -- which is larger than Mercury or Pluto -- also looks likely to be concealing a thick layer of melted, salty water beneath its icy crust, researchers told a meeting of the American Geophysical Union here on Saturday. Margaret Kivelson of the University of California-Los Angeles said that magnetic readings taken by the Galileo craft during close approaches in May 2000 and earlier were ``highly suggestive'' that a salty, liquid ocean existed there. ``It would need to be something more electrically conductive than solid ice,'' she said, adding that a melted layer of water several Kilometers or miles thick, beginning within 120 miles of Ganymede's surface would fit the data if it were about as salty as Earth's oceans. Other scientists studying readings from an infrared spectrometer to identify surface materials on Ganymede said portions of the moon appear to have types of salt minerals that would have been left behind by exposure of salty water near or on the surface. ``They are similar to the hydrated salt minerals we see on Europa, possibly the result of brine making its way to the surface by eruptions or through cracks,'' said Thomas McCord, a geophysicist at the University of Hawaii, Honolulu. That hypothesis is also bolstered by new, high-resolution images of Ganymede sent back by Galileo, which hint that water or slushy ice may have surfaced through the fractured crust to create smooth areas in between separated areas of crust. Dr. Dave Stevenson of the California Institute of Technology said natural radioactivity in Ganymede's rocky interior should provide enough heating to maintain a stable layer of liquid water between two layers of ice, about 90 to 120 miles below the surface. ``I would have been surprised if Ganymede had not had an ocean, but the issue of whether it's there is different than the issue of whether you can expect to see it clearly in the data,'' Stevenson said. Email this story - View most popular | Formatted version ------------------------------------------------------------------------------ -- Advanced Search: Stories Photos Full Coverage Home | Top Stories | Business | Tech | Politics | World | Local | Entertainment | Sports | Science | Health ------------------------------------------------------------------------------ -- Questions or Comments Copyright © 2000 Reuters Limited. All rights reserved. Republication or redistribution of Reuters content is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. <A HREF="http://www.ctrl.org/">www.ctrl.org</A> DECLARATION & DISCLAIMER ========== CTRL is a discussion & informational exchange list. Proselytizing propagandic screeds are unwelcomed. Substance—not soap-boxing—please! These are sordid matters and 'conspiracy theory'—with its many half-truths, mis- directions and outright frauds—is used politically by different groups with major and minor effects spread throughout the spectrum of time and thought. That being said, CTRLgives no endorsement to the validity of posts, and always suggests to readers; be wary of what you read. CTRL gives no credence to Holocaust denial and nazi's need not apply. Let us please be civil and as always, Caveat Lector. ======================================================================== Archives Available at: http://peach.ease.lsoft.com/archives/ctrl.html <A HREF="http://peach.ease.lsoft.com/archives/ctrl.html">Archives of [EMAIL PROTECTED]</A> http:[EMAIL PROTECTED]/ <A HREF="http:[EMAIL PROTECTED]/">ctrl</A> ======================================================================== To subscribe to Conspiracy Theory Research List[CTRL] send email: SUBSCRIBE CTRL [to:] [EMAIL PROTECTED] To UNsubscribe to Conspiracy Theory Research List[CTRL] send email: SIGNOFF CTRL [to:] [EMAIL PROTECTED] Om
