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Signs of a lake found on Mars

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Source: Google images
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Source: Google images
Source: Google images

New York: Researchers have discovered evidence of an ancient lake on Mars that likely represents some of the last potentially habitable surface water ever to exist on the red planet.

Researchers at the University of Colorado at Boulder, examined an 18-square-mile chloride salt deposit in the planet’s Meridiani region near the Mars Opportunity rover’s landing site.

Large-scale salt deposits are considered to be evidence of evaporated bodies of water.

“This was a long-lived lake, and we were able to put a very good time boundary on its maximum age,” said Brian Hynek, a research associate at the Laboratory for Atmospheric and Space Physics (LASP) at CU-Boulder and lead author of the study.

“We can be pretty certain that this is one of the last instances of a sizeable lake on Mars,” Hynek emphsised.

Digital terrain mapping and mineralogical analysis of the features surrounding the deposit indicate that this one-time lake bed is no older than 3.6 billion years old, well after the time period when Mars is thought to have been warm enough to sustain large amounts of surface water planet-wide.

Planetary scientists believe that the solar system was formed approximately 4.6 billion years ago.

Based on the extent and thickness of the salt, the researchers estimate that the lake was only about eight percent as salty as the Earth’s oceans and therefore may have been hospitable to microbial life.

“By salinity alone, it certainly seems as though this lake would have been habitable throughout much of its existence,” Hynek dded.

The study was published in the journal, Geology.

(IANS)

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NASA’s InSight Captures The Sound Of The Martian Wind

InSight landed on Mars on Nov. 26.

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InSight, Mars, NASA, Martian Wind
This Friday, Dec. 7, 2018 photo made available by NASA shows a view from the arm-mounted camera on the InSight Mars lander. The spacecraft arrived on the planet on Nov. 26. VOA

NASA’s new Mars lander has captured the first sounds of the “really unworldly” Martian wind.

The Jet Propulsion Laboratory released audio clips of the alien wind Friday. The low-frequency rumblings were collected by the InSight lander during its first week of operations at Mars.

The wind is estimated to be blowing 10 mph to 15 mph (16 kph to 24 kph). These are the first sounds from Mars that are detectable by human ears, according to the researchers.

“Reminds me of sitting outside on a windy summer afternoon … In some sense, this is what it would sound like if you were sitting on the InSight lander on Mars,” Cornell University’s Don Banfield told reporters.

NASA, Insight, Martian Wind
NASA’s InSight spacecraft, destined for the Elysium Planitia region in Mars’ northern hemisphere, undergoes launch preparations at Vandenberg Air Force Base, Calif. VOA

Scientists involved in the project agree the martian wind has an otherworldly quality to it.

Thomas Pike of Imperial College London said the rumbling is “rather different to anything that we’ve experienced on Earth, and I think it just gives us another way of thinking about how far away we are getting these signals.”

The noise is of the wind blowing against InSight’s solar panels and the resulting vibration of the entire spacecraft. The sounds were recorded by an air pressure sensor inside the lander that’s part of a weather station, as well as the seismometer on the deck of the spacecraft.

The low frequencies are a result of Mars’ thin air density and even more so the seismometer itself — it’s meant to detect underground seismic waves, well below the threshold of human hearing. The seismometer will be moved to the Martian surface in the coming weeks; until then, the team plans to record more wind noise.

NASA, Insight, Martian Wind
This is an illustration showing a simulated view of NASA’s InSight lander about to land on the surface of Mars. This view shows the underside of the spacecraft. VOA

The 1976 Viking landers on Mars picked up spacecraft shaking caused by wind, but it would be a stretch to consider it sound, said InSight’s lead scientist, Bruce Banerdt, of JPL in Pasadena, California.

Also Read: NASA’s InSight Lands Safely On Mars

The “really unworldly” sounds from InSight, meanwhile, have Banerdt imaging he’s “on a planet that’s in some ways like the Earth, but in some ways really alien.”

InSight landed on Mars on Nov. 26.

“We’re all still on a high from the landing last week … and here we are less than two weeks after landing, and we’ve already got some amazing new science,” said NASA’s Lori Glaze, acting director of planetary science. “It’s cool, it’s fun.” (VOA)