Changes

== Possible Subsurface Ammonia Ocean ==

== Possible Subsurface Ammonia Ocean ==

The ammonia-water "[[aquifer]]" might yet exist, however, as a vast subsurface ocean. The ⁴⁰Ar findings certainly suggest this.<ref name=HuygensFindings/> But recently Cassini's controllers carefully mapped fifty of Titan's landmarks and then discovered an apparent shift of all fifty landmarks by as much as 30&nbsp;km (less than 20 miles). This finding suggests that the moon's crust is somehow decoupled from its core and is floating on top of a liquid layer. Astronomers believe that this layer lies 100&nbsp;km (over 60 miles) deep to the rocky surface.<ref name=NASANH3>Brown, Dwayne, and Martinez, Carolina. "[http://www.nasa.gov/home/hqnews/2008/mar/HQ_08085_cassini_ocean.html Cassini Spacecraft Finds Ocean May Exist Beneath Titan's Crust]." [[National Aeronautics and Space Administration|NASA]], March 20, 2008. Accessed May 16, 2008.</ref>

The ammonia-water "[[aquifer]]" might yet exist, however, as a vast subsurface ocean. The ⁴⁰Ar findings certainly suggest this.<ref name=HuygensFindings/> But recently Cassini's controllers carefully mapped fifty of Titan's landmarks and then discovered an apparent shift of all fifty landmarks by as much as 30&nbsp;km (less than 20 miles). This finding suggests that the moon's crust is somehow decoupled from its core and is floating on top of a liquid layer. Astronomers believe that this layer lies 100&nbsp;km (over 60 miles) deep to the rocky surface.<ref name=NASANH3>Brown, Dwayne, and Martinez, Carolina. "[https://www.nasa.gov/home/hqnews/2008/mar/HQ_08085_cassini_ocean.html Cassini Spacecraft Finds Ocean May Exist Beneath Titan's Crust]." [[National Aeronautics and Space Administration|NASA]], March 20, 2008. Accessed May 16, 2008.</ref>

== Problems for Uniformitarian Theories ==

== Problems for Uniformitarian Theories ==

Huygens was designed to land, and to study the atmosphere and the surface in detail on the way down. Huygens landed fully functional on Titan on January 14, 2005. It remained functional for three hours while it sent back many images and much data on the composition, including the carbon-isotopic ratio, of the Titanian atmosphere.

Huygens was designed to land, and to study the atmosphere and the surface in detail on the way down. Huygens landed fully functional on Titan on January 14, 2005. It remained functional for three hours while it sent back many images and much data on the composition, including the carbon-isotopic ratio, of the Titanian atmosphere.

Cassini continues to study Titan and the rest of the Saturnine system. Its mission was originally scheduled to run for four years, ending in July 2008, but NASA has announced a two-year extension with multiple rendezvous with Titan and additional rendezvous with [[Enceladus]], [[Rhea (moon)|Rhea]], [[Dione (moon)|Dione]], and [[Helene]]. Mission planners also suggest that after two years, Cassini might still have enough fuel for another two-year extension, and speak hopefully of specific future missions to Titan and Enceladus.<ref name=extended>Brown, Dwayne, and Martinez, Carolina. "[http://www.nasa.gov/mission_pages/cassini/media/cassini-20080415.html NASA Extends Cassini's Grand Tour of Saturn]." [[National Aeronautics and Space Administration|NASA]], April 15, 2008. Accessed May 16, 2008.</ref>

Cassini continues to study Titan and the rest of the Saturnine system. Its mission was originally scheduled to run for four years, ending in July 2008, but NASA has announced a two-year extension with multiple rendezvous with Titan and additional rendezvous with [[Enceladus]], [[Rhea (moon)|Rhea]], [[Dione (moon)|Dione]], and [[Helene]]. Mission planners also suggest that after two years, Cassini might still have enough fuel for another two-year extension, and speak hopefully of specific future missions to Titan and Enceladus.<ref name=extended>Brown, Dwayne, and Martinez, Carolina. "[https://www.nasa.gov/mission_pages/cassini/media/cassini-20080415.html NASA Extends Cassini's Grand Tour of Saturn]." [[National Aeronautics and Space Administration|NASA]], April 15, 2008. Accessed May 16, 2008.</ref>

== In fiction ==

== In fiction ==