Wednesday , December 8 2021

Chinese Newsletter – Herald News – It's easier to find signs of ancient life on Mars than on earth



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Researchers involved in NASA's next March mission say it is easier to find signs of ancient life on Mars than on earth.

A six-wheeled robot will land on this red planet in 2021, with the specific purpose of finding evidence of past creatures. It will look for clues from rocks that can be 3.9 billion years old.

Researchers say it's very hard to find life 3.9 billion years ago on earth, but there may be better conservation conditions on Mars.

This is due to the dynamic process of the earth, where the stones are continually agitated and recycled, so that traces of life are eliminated. But the red planet stopped the process early in its history.

"For example, we do not believe that Mars has a plating process that is often experienced in the history of the earth," said Ken Willford of NASA's Jet Propulsion Laboratory (JPL) in California.

"Most of the Earth's rock discs have been destroyed by movement under the sea crust. And even the rocks that remain on the surface are heated and pressed and they are not on Mars."

"So it's likely that the old Rock on Mars is better than the new rock," he told BBC News.

NASA: It is easier to find signs of ancient life on Mars than on Earth.The Jezero crater shows strong evidence of previous water activity courses.

The new Mars will be placed close to the crater, known as Jezero near the equator in Mars, and satellite observations show that once upon a time there was a deep lake.

Researchers hope that if microbes live in or around this water source, signs of their existence will remain in the sediment. Today, sediment can be drilled easily.

One of the most important goals will be carbonate deposits, which seem to resemble the old sandy beaches.

"Carbonates are minerals that precipitate out of the water. The real beauty of this process is that when they fall, they combine all substances in the water. So everything that lives there can be preserved." Minerals, "explains Briony Horgan of Purdue University, Indiana.

Ideally, Mars will find suspicious structures that look like stromatolites, which are carbonate domes built by microorganisms.

The rover will drill the samples along the river bank to select the most likely place and place the samples in a jar and leave it on the ground for later retrieval.

NASA and its European counterpart Esa are currently planning to collect 40 samples of the rover together in the early 1930s.

Dr. Williford and Dr. Horgan discusses Mars Rover prospects at the American Geophysical Union (AGU) Fall Conference in Washington. This is the largest annual collection of space and space researchers.

NASA: It is easier to find signs of ancient life on Mars than on Earth.The new Mars Rover was designed according to the design template of the Curiosity Robot that landed on Mars in 2012.

This car will be an approximate copy of curiosity landed in the Gale Crater 2012.

It will use the same "Skycrane" technology, which gives the previous machines a very high delivery reliability. In addition, this rover has added an important additional feature. Engineers have developed a dynamic mapping system called Terrain-Relative Navigation that will give more accuracy to landings.

Ken Farley, the supervisor of the mission, told the AGU conference that the route after landing the Mars car has been planned.

The robot will be equipped with a sophisticated navigation system that enables you to independently calculate the best and most direct route between two points.

This would greatly increase the speed to reach different goals. "With good terrain, we will train more than 100 meters a day," told Farley BBC News.

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