Washington: An analysis of gravity and topography data from Saturn`s largest moon, Titan, has revealed that its ice shell is rigid and the small topographic features on its surface are linked with large roots extending into the underlying ocean.
Led by planetary scientists Douglas Hemingway and Francis Nimmo at the University of California, Santa Cruz, the study used new data from NASA`s Cassini spacecraft.
Nimmo, a professor of Earth and planetary sciences at UC Santa Cruz, said that on Titan, when you fly over a mountain the gravity gets lower, which is a very odd observation.
To explain that observation, the researchers developed a model in which each bump in the topography on the surface of Titan is offset by a deeper "root" big enough to overwhelm the gravitational effect of the bump on the surface.
The root is like an iceberg extending below the ice shell into the ocean underneath it.
Nimmo explained that because ice is lower density than water, you get less gravity when you have a big chunk of ice there than when you have water.
Lead author Hemingway, a doctoral candidate in planetary geophysics at UCSC, said that if large roots are the reason for the negative correlation, it means that Titan`s ice shell must have a very thick rigid layer.
The researchers calculated that, in this model, Titan`s ice shell would have to have a rigid layer at least 40 kilometers thick and found that hundreds of meters of surface erosion and deposition are needed to account for the observed imbalance between the large roots and small surface topography.
The study has been published in the journal Nature.
ANI
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts.
Cookies Setting
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device and the processing of information obtained via those cookies (including about your preferences, device and online activity) by us and our commercial partners to enhance site navigation, personalise ads, analyze site usage, and assist in our marketing efforts. More information can be found in our Cookies and Privacy Policy. You can amend your cookie settings to reject non-essential cookies by clicking Cookie Settings below.
Manage Consent Preferences
Strictly Necessary Cookies
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work or you may not be able to login.
Functional Cookies
These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.
Targeting Cookies
These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They are also used to limit the number of times you see an advert as well as help measure the effectiveness of an advertising campaign. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising.
Performance Cookies
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we may not know when you have visited our site, and may not be able to monitor its performance.