Underground ocean found on Pluto, likely slushy with ice
Published: 2016-11-17 13:56:50.0 BdST Updated: 2016-11-17 13:56:50.0 BdST
Scientists have found evidence that tiny, distant Pluto harbours a hidden ocean beneath the frozen surface of its heart-shaped central plain containing as much water as all of Earth's seas.
The finding, reported on Wednesday in two research papers published in the journal Nature, adds Pluto to a growing list of worlds in the solar system beyond Earth believed to have underground oceans, some of which potentially could be habitats for life.
Pluto's ocean, which is likely slushy with ice, lies 150 to 200 km beneath the dwarf planet's icy surface and is about 100 km deep, planetary scientist Francis Nimmo of the University of California, Santa Cruz said in an interview.
With its ocean covered by so much ice, Pluto is not a prime candidate for life, added Massachusetts Institute of Technology planetary scientist Richard Binzel, another of the researchers. But Binzel added that "one is careful to never say the word impossible."
Liquid water is considered one of the essential ingredients for life.
The discovery was made through an analysis of images and data collected by NASA's New Horizons spacecraft, which flew past Pluto and its entourage of moons in July 2015.
"It shows that nature is more creative than we are able to imagine, which is why we go and explore," Binzel said. "We see what nature is capable of doing."
Despite being about 40 times farther from the sun than Earth, Pluto has enough radioactive heat left over from its formation 4.6 billion years ago to keep water liquid.
"Pluto has enough rock that there's quite a lot of heat being generated, and an ice shell a few hundred kilometers thick is quite a good insulator," Nimmo said. "So a deep subsurface ocean is not too surprising, especially if the ocean contains ammonia, which acts like an antifreeze."
Scientists made the discovery as they were trying to figure out why a 621-mile (1,000-km) wide impact basin known as Sputnik Planitia, which contains the curious heart-shaped region, was located in its present position near Pluto's equator.
Computer models showed the basin likely filled with ice, which caused Pluto to roll over, cracking its crust. That could happen only if Pluto possessed a subsurface ocean, the analysis found.
New Horizons is on its way to another frozen world in the Kuiper Belt region of the solar system about 1.6 billion km past Pluto. A flyby of the object, known as 2014 MU69, is scheduled on Jan 1, 2019.
Any unauthorised use or reproduction of bdnews24.com content for commercial purposes is strictly prohibited and constitutes copyright infringement liable to legal action.
- SpaceX returns to flight, sending satellites into orbit
- SpaceX counts down to first launch after rocket explosion
- Scientists link higher dementia risk to living near heavy traffic
- Scientists discover a new human organ
- Virtual butler 'Jarvis' takes up residence in Facebook founder's home
- Remarkable feathered dinosaur tail found in chunk of amber
- Human ancestor 'Lucy' adept at tree climbing as well as walking
- Navigation system failure cited in crash of European Mars lander
- Trump wants NASA to focus on deep space missions
- US weather satellite's launch promises 'quantum leap' in forecasts
- Bangladesh probing Bengali army officers' crime links in Pakistan war
- Cricketer Arafat Sunny remanded in ICT case filed by woman
- President hopes Bangladesh will get developed nation status by 2041
- Two Indian soldiers killed in Assam
- Bangladesh to devise master plan in January to improve its 'ease of doing business' rankings
- Bangladesh cricketer Arafat Sunny arrested in ICT case filed by woman
- New Zealand complete series sweep after Bangladesh collapse
- Arrests on fake warrants discovered in Bangladesh
- Awami League leader fires his shotgun, injures 20 in Kushtia
- Hasina promises to track down, bring MP Liton's killers to justice