Science

Liquid water 'lake' is discovered on Mars

Liquid water 'lake' is discovered on Mars”

Depending on where and how you look, you can find plenty of water on Mars. It also opens up the possibility that it is a reservoir not just of water, but of life.

The team also suspects that while they have only found evidence for water at one location, it probably isn't the only subglacial lake on Mars.

All of that water is either locked up in solid form, however, or locked away in the distant past.

"This subsurface anomaly on Mars has radar properties matching water or water-rich sediments", Roberto Orosei, principal investigator of the MARSIS experiment and lead author of the paper, said in a press release. Apparently, the discovery was made using Marsis (Mars Advanced Radar for Subsurface and Ionosphere Sounding), a radar instrument that is used by scientist to study beneath a planet's surface. Adding salt-and we've found lots of evidence of salt on Mars-can lower the freezing point of water by turning it into a brine. The study area is highlighted using a THEMIS IR image mosaic.

Those pulses reflected 29 sets of radar samples that created a map of drastic change in signal nearly a mile below the surface. USGS Astrogeology Science Center, Arizona State University, ESA, INAF.

Mars' southern polar ice cap has a thickness of about 3,000 metres, reports NASA in an unrelated study, it is similar to the northern one and spreads about 400 km and it is elevated about 6 km higher than Martian sea level. There are hundreds of this of subglacial lake on Earth, mostly in Antarctica.

The lake, believed to be minus-90 degrees Fahrenheit, is similar to what lies beneath the ice cap in Greenland and the Antarctic. This keeps the lake at just below freezing temperatures, and it maintains a liquid state due to the huge weight of the ice above pressing down on it.

Located under a layer of Martian ice, the lake is about 20 kilometers (12 miles) wide, said the report led by Italian researchers in the U.S. journal Science.

"This water would be extremely cold, right at the point where it's about to freeze".

So, how did MARSIS find this lake?

Scott Hubbard, a professor of astronautics at Stanford University who served as NASA's first Mars program director in 2000, called it "tremendously exciting".

However, the planet's climate has since cooled due to its thin atmosphere, leaving most of its water locked up in ice. This is the first spectral detection that unambiguously supports our liquid water-formation hypotheses for RSL.

Artistic impression of the Mars Express spacecraft probing Mars and of Planum Australe. A radar cross section of the southern polar layered deposits is shown as a detail. The process requires a detailed understanding of the radar signals that were transmitted downward toward Mars by Mars Express. MARSIS sends electromagnetic pulses down to the planet and measures how they echo back - and Orosei and colleagues discovered especially bright reflections from a broad region spanning about 12 miles, about a mile below the ice. With the stunning findings, that debate is likely to be put to bed.

"Even with those limitations, we've now found that there is likely to be liquid water in the Martian subsurface", Stamenkovic said.



Like this

loading...
loading...

Latest


25 July 2018
Cavs.com Feature - Feeling the Love
He will be paid $28.9 million in 2019-20, $31.3 million in 2020-21 and 2021-22, and $28.8 million in 2022-23. The pundits have had Kevin Love on the trading block seemingly from the moment he arrived in Cleveland.

25 July 2018
Ahead of EU Meeting, Trump Rails at Domestic Critics
Schlosser said he had been "transitioning" his farm to his son, but the future doesn't look good for young farmers now, he said. There were 73.5 million pigs on farms as of June 1, the highest number on that date since records began in 1964.

25 July 2018
Detained pizza worker due in court
Villavicencio's two girls, ages 2 and 4, played with toys today as courtroom spectators around them observed the legal arguments. He said Villavicencio's release is necessary because his imminent removal from the U.S.is no longer reasonably forseeable.

25 July 2018
Demi Lovato Was Given Narcan for Heroin Overdose
Lovato was in the final days of her current United States tour. "Addiction and mental illness doesn't discriminate". When she left the treatment center, she relapsed and then entered a sober living facility for a year.

25 July 2018
Georgia state rep Jason Spencer Uses Racial Slurs and Eats Prop Penis
Spencer told the Atlanta Journal-Constitution the show "exploited" his state of mind "for profit and notoriety". After shouting a racial slur multiple times, Cohen told him the "N-word" he'd been referring to was "Noonie".

25 July 2018
Oakland BART slaying suspect arrested
An anonymous tip from a rider on a Bay Area Rapid Transit train led to the arrest of Cowell, 27, Rojas said at a news conference . He went on to describe the confusion he experienced when he got the phone call on Sunday night that something awful had happened.

25 July 2018
CNN plays audio recording of conversation between Trump and Michael Cohen
Giuliani told Laura Ingraham, host of "The Ingraham Angle," that he found out the tape was leaked at 6 p.m. McDougal alleges that she and Trump an affair in 2006; Trump has steadfastly denied that.

25 July 2018
Tour de France: three crucial stages that will decide yellow jersey
And it could have been that the wind carried that spray into the peloton, affecting several of the riders. Froome sits second in the general classification, 60.39 seconds behind Sky teammate Thomas.

25 July 2018
US President Donald Trump threatens to strip critics of security clearances
He said that Russian Federation "did meddle with our elections" and that he would consider further sanctions against Moscow. Ryan said he hopes Trump will stress to Putin that Russian Federation can not interfere in USA affairs.

25 July 2018
Pogba has to give his best for United - Mourinho calls for focus
Jose Mourinho tells ESPN FC that the World Cup was the ideal habitat for Paul Pogba as he could 'only think about football'. Asked directly how many new signings he would like, Mourinho said: "I would get two more players".