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Cassini mission discovers ‘lakes’ on Saturn’s moon Titan

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Washington: A study using data from the joint NASA and the European Space Agency (ESA) Cassini mission suggests the Saturn moon Titan’s surface indentation that is similar to creation of sinkholes on the Earth.

Apart from the Earth, Titan is the only body in the solar system known to possess surface lakes and seas, which have been observed by the Cassini spacecraft.

The team calculated how long it would take for patches of Titan’s surface to dissolve to create these features.

“We compared the erosion rates of organics in liquid hydrocarbons on Titan with those of carbonate and evaporite minerals in liquid water on Earth,” said Thomas Cornet of the European Space Agency.

“We found that the dissolution process occurs on Titan some 30 times slower than on Earth due to the longer length of Titan’s year and the fact it only rains during Titan summer. Nonetheless, we believe that dissolution is a major cause of landscape evolution on Titan and could be the origin of its lakes,” Cornet said.

These are terrestrial landscapes that result from erosion of dissolvable rocks such as limestone and gypsum, in groundwater and rainfall percolating through rocks.

Over time, this leads to features like sinkholes and caves in humid climates and salt-pans where the climate is more arid.

The rate of erosion creating such features depends on factors such as the chemistry of the rocks, the rainfall rate and the surface temperature.

While all of these aspects clearly differ between Titan and Earth, the researchers think the underlying process may be surprisingly similar.

“By comparing Titan’s surface features with examples on the Earth and applying a few simple calculations, we have found similar land-shaping processes that could be operating under very different climate and chemical regimes,” said Nicolas Altobelli, ESA’s Cassini project scientist. (IANS)

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Emmy Awards 2018: NASA Nominated for Stunning Footage of Cassini voyage to Saturn

The Emmy Awards nominations have turned out to be more diverse than last year

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The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17.
The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17. Flickr

The Academy of Television Arts and Sciences (ATAS) has nominated NASA’s Jet Propulsion Laboratory (JPL) for Outstanding Original Interactive Program for its coverage of the Cassini mission’s Grand Finale at Saturn.

The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17.

The Creative Arts Emmys, which include interactive awards, will be presented during a separate ceremony on September 15 at the Microsoft Theatre in Los Angeles, NASA said in a statement on Friday.

In 2017, after nearly 20 years in space and 13 years revealing the wonders of Saturn, NASA’s Cassini orbiter was running out of fuel. As a final act, Cassini began a whole new mission — its Grand Finale, where it journeyed into the unknown and ended with a spectacular plunge into the planet.

Cassini’s first, daring dive into the unexplored space between the giant planet and its rings kicked off the campaign on April 26 in 2017.

NASA's stunning footage of Cassini lands Emmy nomination
NASA’s stunning footage of Cassini lands Emmy nomination. Pixabay

It culminated on September 15, 2017, with live coverage of Cassini’s plunge into Saturn’s atmosphere, with the spacecraft sending back science to the very last second.

JPL created a multi-month digital campaign to celebrate the mission’s science and engineering accomplishments and communicate why the spacecraft must meet its end in the skies of Saturn.

The multi-faceted campaign included regular updates on Twitter, Facebook, Snapchat, Instagram and the Cassini mission website, multiple live social, web and TV broadcasts during which reporter and public questions were answered.

Also Read: NASA Juno Data Indicate Another Possible Volcano on Jupiter Moon Io

A dramatic short film to communicate the mission’s story and preview its endgame; multiple 360-degree videos, including NASA’s first 360-degree livestream of a mission event from inside JPL mission control.

The Emmy Awards nominations have turned out to be more diverse than last year. Fantasy drama “Game of Thrones” has earned 22 nominations for the coveted Awards, while HBO’s 17-year streak as the most nominated network has been broken by Netflix. (IANS)

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