Saturday , December 5 2020

Chinese Newsletter – Herald News – It is easier to find signs of ancient life on Mars than on Earth



Researchers involved in NASA's next March mission say that 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 former beings. It will look for traces of cliffs 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 on Mars.

This is due to the dynamic process on earth where the stones are constantly 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 plate-driving process that is often experienced in Earth's history," said Ken Willford of NASA's Jet Propulsion Laboratory (JPL) in California.

"Most of the earth's rock panels have been destroyed by movement under the crust of the ocean. 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's 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 located near the crater known as Jezero near Mars equator, and satellite observations show that there was once a deep lake.

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

One of the main goals is carbonate deposits, which resemble the shores of the old lakes.

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

Ideally, Mars will accidentally find structures similar to stromatolites, which are carbonate domes built by microorganisms.

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

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

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

NASA: It's easier to find signs of ancient life on Mars than on Earth.The new Mars Rover was designed in accordance with the design template for Curiosity Robot, which landed on Mars in 2012.

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

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

Ken Farley, the missionary's top scientist, told the AGU conference that the route after landing the Mars car is scheduled.

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

This should greatly increase the speed of achieving different goals. "With good terrain, we will exercise more than 100 meters a day," Farley told BBC News.


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