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NASA Scientists say, Pluto’s Icy Heart is very much Alive and Kicking

Inside the region known as Sputnik Planum, Strange shapes were seen that suggest the tiny world is constantly repaving its surface with churning ice

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Spherical mosaic of New Horizons images showing the expanse of Sputnik Planum (released September 10, 2015). Image source: Wikipedia
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  • Scientists find evidence that Pluto’s surfaces are re-paved through convection every 500,000 years
  • The energy to power this activity comes from decaying radioactive elements
  • The movement of nitrogen ice layers helps power the planet’s atmosphere

The primary attraction of the photos that were sent back from NASA’s New Horizons Spacecraft, which made a 2015 voyage around Pluto, was the huge heart shape on the planet’s surface. The heart shape is considered to be a plain named Sputnik Planum that has no visible craters that were detectable by New Horizons, leading to the conclusion that it is less than 2 million years old.

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The heart-shaped Sputnik Planum undergoes a very interesting internal activity through which its surface is repaved every 500,000 years. This period may seem very slow on the human clock, but scientists say 500,000 years is rapid on the geographical timeline.

The process, called convection, replaces older nitrogen ice sheets with newer ones, with the help of reservoirs that are several miles deep. The newer layers of ice spread out on the surface and replenish any craters that might have formed, making the plain look perpetually youthful.

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New Horizons Probe

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“We found evidence that even on a distant cold planet billions of miles from Earth, there is sufficient energy for vigorous geological activity, as long as you have ‘the right stuff,’ meaning something as soft and pliable as solid nitrogen,” noted William McKinnon, who is co-investigator on the New Horizons science team.

The energy to power the continuous processes revolving around convection has its source in the decaying radioactive elements embedded in the surface.

“Not only is it the heart of Pluto, it’s the beating heart,” says Bill McKinnon of Washington University in St Louis. “There are actually things happening. If we were to come back in 100,000 years, the pattern would be markedly altered.”

It is yet uncertain whether this feature is unique to Pluto’s surface, or it is also common to other planets found in the neighborhood of Pluto, such as Makemake or Eris. Celestial bodies in the Kuiper Belt could also possess these surfaces. The constant movement of nitrogen ice sheets is believed to help support Pluto’s atmosphere.

-by Saurabh Bodas, an intern at NewsGram. Twitter: @saurabhbodas96

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NASA On The Outlook To Find The Name Of Its New Mars Rover

Mars 2020 is targeted for launch in July or August 2020 from the Cape Canaveral Air Force Station in Florida.

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TESS, rover
NASA Curiosity rover completes 6 years on Mars. Pixabay

NASA is on the look out for a partner to conduct a contest among students to name the agency’s next rover to the Red Planet — the Mars 2020 mission — in the 2019 academic year.

The Mars 2020 rover mission addresses high-priority science goals for Mars, including key questions about the potential for life on the Red Planet.

Corporations, nonprofits and educational organisations interested in sponsoring the contest can send proposals to NASA.

Rover
The selected partner will have an opportunity to be part of a historic mission, NASA said. IANS

To be considered, all proposals must be received by October 9, NASA said in a statement on Friday.

“We’ve been doing naming contests since the very first Mars rover back in 1997,” said Thomas Zurbuchen, Associate Administrator for the Science Mission Directorate at NASA Headquarters, in Washington.

“Thousands of kids participate, and their enthusiasm for the contest and Mars is infectious,” Zurbuchen said.

TESS, rover
An artist’s concept provided by NASA shows the Keplar Spacecraft moving through space. VOA

The selected partner will have an opportunity to be part of a historic mission, NASA said.

Also Read: Balloon Mission by NASA May Lead to Improved Weather Forecasting

Mars 2020 is targeted for launch in July or August 2020 from the Cape Canaveral Air Force Station in Florida. (IANS)