The researchers at SwRI in Texas aren't ruling out other theories for the formation of Pluto, which sits far out at the edge of the solar system in the Kuiper Belt. It's possible the dunes were formed even more recently.
"But it turns out that Pluto, while being 30 times farther away from the sun than Earth, has similar characteristics to those of the Earth". "Put together, we have found that these combined processes can form dunes under normal, everyday wind conditions on Pluto". They reported that a nitrogen ice sheet over the top of Sputnik Planitia was converted into gas, elevating the methane particles into the atmosphere. The scientists noticed that the ridges ran parallel with a major mountain range, that seemed to shift and spread out.
Dr Telfer said the analysis provided a new insight to Pluto and also changed our view of it. This requires the grains to be entrained in the wind - if grains are compressed and consolidated, as would be the case in a deeply frozen or solid rocky surface, then they can not readily be transported.
"I can drive down to the sand dunes at Little Sahara and be driving around on something that's nearly exactly the same as the surface of Pluto", Radebaugh said.
Scientists were impressed to find dunes on Pluto because it has a thin atmosphere. "That tells us that the atmosphere works with the surface on Pluto and helps shape it". The Science journal reports, "The likely source of the dune grains is methane ice blown from nearby mountains". Methane ice breaks into tiny particles.
Though the winds may be relatively slow, the nature of the terrain has contributed to the formation of the dunes, the researchers argue.
"On Earth, you need a certain strength of wind to release sand particles into the air, but winds that are 20% weaker are then sufficient to maintain transport", Eric Parteli, study co-author and lecturer in computational geosciences at the University of Cologne, said in a statement.
That's sublimation, with temperature gradients created by solar radiation affecting the granular ice layer.
Dunes made out of solid methane particles have been discovered on Pluto.
"He quoted the late Sir Patrick Moore, the famous BBC Sky at Night presenter, describing Pluto in 1955 as "...plunged in everlasting dusk, silent, barren, and touched with the chill of death..." and says that that perspective has to shift.
The dunes have reportedly formed in the last 500,000 years. This activity is most likely caused by a thermal, convective overturning of the ice.
Besides Pluto, we already knew that Mars, Venus or the great moon of Saturn Titan had dunes. With a surface temperature of around -230 degrees Celsius, the individual grains may look like Earth sand, but they're made of something very different. "The winds needed to transport the sediments can therefore be 100 times lower", he says. "It is another piece of the jigsaw in making sense of this diverse and remote body, and gives us a more fundamental understanding of the geological processes which are influencing it".
James is already the career leader in finals 3-pointers with 83, but Stephen Curry is closing fast and only two behind him. Thompson took offense about whether he felt "helpless" guarding Stephen Curry , according to Yahoo Sports .
Islamic State in Iraq and Syria later said it had carried out the deadly suicide attack, without providing evidence for its claim. However, another security official says at least 14 people were killed and 17 others were wounded in the attack.
And, under the guise of an innovative new feature, they've added something other platforms have had for some time. Arguably the biggest immediate feature upgrade from WWDC this year was group messaging on FaceTime.
The filing marks the second time that Mueller's team has accused Manafort of violating a judge's order in the case. Then in March he pleaded not guilty to charges of bank and tax fraud, setting up a separate trial for July 10.
Asked whether Trump has the power to give himself a pardon, Giuliani said, "He's not, but he probably does". And one of the articles of impeachment prepared against Richard Nixon in 1974 was for obstruction.
The reporter acknowledged Williams must want to get back to her daughter but asked her to "work with me here, please". I've made every sacrifice I could. "I think Serena can get close to winning another Grand Slam".
In addition, women 50 and younger who scored between zero and 15 could be spared chemotherapy and its toxic side effects. In the US , the most recent data shows around 135,000 new cases yearly of the specific breast cancer studied, says Dr.
Apple also expanded its Do Not Disturb feature to hide all notifications on the main screen at night when you're trying to sleep. You can add shortcuts from travel apps as well, to get notifications on when you should leave, and any changes that occur.
Scott was seen getting close to a mystery woman on Thursday 31 May at Kanye West's album release party in Wyoming . Sofia Richie and Scott Disick's breakup made news Saturday. "He thinks she might change her mind", they added.
Man run down 50 years after killing girl in hit-and-run
Coincidentally, Parkhurst, a Vietnam War veteran, confessed five years ago to killing a 4-year-old girl in a 1968 hit-and-run. A motorist who witnessed the accident later told Fulton police he believed a teddy bear had been hit and thrown.
Trump Tweet: Why Didn't FBI Tell Me About Manafort?
Manafort faces two indictments in Washington, D.C., and Virginia on charges related to tax fraud and other financial crimes . Special Counsel Robert Mueller , attempted to tamper with potential witnesses, Mueller said in a court filing on Monday.
Kilauea Volcano Area Sees 500 Earthquakes in 24-hours
Seven people were cited Saturday for loitering in a disaster zone, and they will have to appear in court, Hawaii officials said. It advised residents in communities downwind, including Pahala, Ocean View and Kona, to limit their exposure to gas and ash.
IOS 12 to watchOS 5: Everything Apple announced at WWDC 2018
But before that, Apple introduced some major upgrades to nearly all its platforms, starting with the much-anticipated iOS 12 . The tvOS developer preview is available for Apple Developer Program members at developer.apple.com starting today.
Outgoing Starbucks chairman may run for office
The company also long projected itself as a socially conscious company and promoted its stores as neighborhood gathering places. He oversaw the expansion of the chain's food and beverage menu and the growth of its popular loyalty program and mobile app.
Facebook gave 60 device makers "deep access" to user data
Apple also showcased a new system that makes it more hard to gather information about users as they browse across the web. This would mean that the likes of Apple and Samsung have had potential access to user data for some time .