2021-07-22

Talking about how NASA “Perseverance” will collect samples of Mars and bring them back to Earth

By yqqlm yqqlm

Talking about how NASA “Perseverance” will collect samples of Mars and bring them back to Earth

The evaluation work will start on June 1, “Perseverance “No.” will focus on the 1.5 square mile crater area. The site was selected by scientists at NASA’s Jet Propulsion Laboratory (JPL), which manages the probe, and they believe it contains the deepest and oldest exposed bedrock.

However, even if the final location of this part is determined-NASA is expected to complete it in the next two weeks or so, the sampling process itself will take nearly two weeks to complete. The key to all this is the 7-foot-long robotic arm of Perseverance. It will first arrange the working space of the detector: effectively arrange all the tools and equipment it needs. In fact, scientists will choose two locations: one as a sampling point, and one as a “near science” area.

Talking about how NASA “Perseverance” will collect samples of Mars and bring them back to Earth(1)

After that, there will be five types Different instruments go into work. Vivian Sun of JPL said: “First, we will use a drill bit to scrape off the rock and dust on the surface, exposing the fresh unweathered surface, and then blow it clean with a gas dust removal tool, and then use our nearby scientific instrument SHERLOC, which is installed in the turret. PIXL and WATSON are in close contact.”

These three tools will provide NASA with targeted mineral and chemical analysis. At the same time, the SuperCam will emit laser light on the worn surface, and then use spectroscopy to measure the plume produced. Finally, the Mastcam-Z camera will record the entire process with high resolution.

However, the ability of Perseverance to conduct on-site analysis is only part of NASA’s vision for Mars samples. After charging the probe’s solar panels for one day, the JPL team will continue sampling.

Although Perseverance will not return to Earth, it will collect Martian rock samples and finally analyze them on Mars. To this end, NASA has developed an ultra-clean sampling system to minimize the chance of carrying pollutants from the earth to Mars.

After returning to the Adaptive Caching Assembly, the volume of the sample will be measured and photographed. Subsequently, the container was sealed and stored. Eventually, NASA plans to leave these sample tubes on the surface of Mars and will bring the sample tubes back to orbit in future missions. The next task is to collect it from there and bring it back to Earth.

NASA said that the entire process will take about 11 days in total. Although it is understandable that people are excited about the Perseverance’s sampling work, the team responsible for the Perseverance probe also knows very well that there are limits to what they want to find from these early collections of large rocks.

Talking about how NASA “Perseverance” will collect samples of Mars and bring them back to Earth(2)

California Institute of Technology “Perseverance” Project scientist Ken Farley pointed out: “The samples collected by Perseverance are not all for the search for ancient life. We don’t expect this first sample to provide decisive evidence in some way. Although the rocks in this geological unit are not organic matter. We believe that they have existed since the formation of the Jezero crater, which is very valuable to fill the gap in our understanding of the geology of this area-we urgently need to know whether life once existed on Mars.”

< p>It will take some time for scientists to load Martian rock samples onto equipment on Earth. Although NASA has awarded a contract for the recycling container system, the NASA/ESA joint mission is not expected to be completed until 2028 at the earliest.