JUL 10, 2016 10:59 AM PDT

Does Pluto's Surface Hide an Ocean Underneath?

WRITTEN BY: Anthony Bouchard

It was about one year ago that NASA’s New Horizons spacecraft made its historic flyby of the dwarf planet Pluto in the outskirts of our solar system, but scientists have been observing scientific data for months following that event.
 
More data revealed by New Horizons suggests that there could be an ocean swishing around underneath the surface, as deep as 300 kilometers. Even if not anymore, such an under-surface ocean might have existed at some point in time.
 

Pluto's surface shows signs of expansion.

 Image Credit: NASA/New Horizons

The idea, which was proposed by researchers from Brown University, comes from theories proposed by looking at the many photos of Pluto’s surface. The findings are published in the Geophysical Research Letters.
 
It’s dully noted that Pluto, as a whole, would have contracted if there was once liquid on the planet and it disappeared, and there are no signs of any contraction, which would mean deformities and even cracking in Pluto’s various mountainous terrains and smooth heart-shaped plain.
 
“Thanks to the incredible data returned by New Horizons, we were able to observe tectonic features on Pluto’s surface, update our thermal evolution model with new data and infer that Pluto most likely has a subsurface ocean today,” said Noah Hammond, the study’s lead author and a graduate student in Brown’s Department of Earth.
 
On the contrary, Pluto shows signs of having expanded, which indicates that either the liquid is still there, or it hasn’t been gone for long.
 
“What New Horizons showed was that there are extensional tectonic features, which indicate that Pluto underwent a period of global expansion,” Hammond said. “A subsurface ocean that was slowly freezing over would cause this kind of expansion.”

New Horizons reportedly spotted many signs of tectonic expansion, which is in line with ice formation. After all, ice is not as dense as water because when ice forms, water molecules expand.
 
The report also notes that there really aren’t any other likely ways Pluto could have expanded. The opposing theory that Pluto’s moons had a gravitational pull on the dwarf planet’s surface and caused expansion really hold no water.
 
So you might be wondering why the surface of Pluto hasn’t melted yet if the inner layers have.
 
Just to touch on that, the researchers have also noted in their statement that radiation from Pluto’s core probably produced enough heat to melt through several of Pluto’s inner layers, but the outer layers are kept nice and chilled from the insulating properties of frozen methane and nitrogen, which help prevent the melting of all of Pluto’s layers.
 
Pluto is indeed a very interesting entity that we have to investigate further, but it isn’t easy because it’s so far away. It took us almost nine and a half years for New Horizons to get the data it did, and now it’s rocketing out into the Kuiper Belt where it’ll move on to a new target.
 
All we have to go by right now are the many photographs that show us the many personalities of Pluto.
 
Source: Brown University

About the Author
Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
JUL 23, 2022
Space & Astronomy
Spiraled Planet-Forming Disk Found Near Galactic Center
JUL 23, 2022
Spiraled Planet-Forming Disk Found Near Galactic Center
In a recent study published in Nature Astronomy, a team of astronomers have observed a massive young star near the cente ...
JUL 30, 2022
Chemistry & Physics
A Brown Dwarf from the Early Universe is Lurking in Our Neighborhood
JUL 30, 2022
A Brown Dwarf from the Early Universe is Lurking in Our Neighborhood
When one refers to a star or a galaxy or any other object as metal-poor, it simply means that this object was formed in ...
NOV 02, 2022
Space & Astronomy
ESA's Solar Orbiter Captures Extraordinary Views of the Quiet Corona
NOV 02, 2022
ESA's Solar Orbiter Captures Extraordinary Views of the Quiet Corona
On October 12, 2022, the European Space Agency’s (ESA) Solar Orbiter mission had its second close encounter with t ...
NOV 05, 2022
Space & Astronomy
Rare Earth Elements Created in Neutron Star Mergers
NOV 05, 2022
Rare Earth Elements Created in Neutron Star Mergers
In a recent paper published in The Astrophysical Journal, astronomers present the first ever detection of rare Earth ele ...
NOV 14, 2022
Space & Astronomy
Astronomers Have Discovered the Closest Black Hole to Earth
NOV 14, 2022
Astronomers Have Discovered the Closest Black Hole to Earth
Astronomers have discovered the closest known black hole to Earth. This historic discovery has been published in the Mon ...
DEC 02, 2022
Space & Astronomy
Hunt For Dark Matter Gets Good News
DEC 02, 2022
Hunt For Dark Matter Gets Good News
In a recent study published in Physical Review Letters, an international team of researchers led by the Albert Einstein ...
Loading Comments...