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[ Hot Focus on Chemical Machinery and Equipment Network ] Is there water on the moon? The "Lunar Mineral Spectrometer" carried by Chang'e 5 shows that there are about 120 grams of "water" in 1 ton of lunar soil
.
But the "water" detected by the spectrometer refers to water molecules or hydroxyl groups in minerals, which can be converted into water we drink under certain conditions
.
Chemical machinery and equipment network hotspots focus on chemical machinery and equipment.
But the "water" detected by the spectrometer refers to water molecules or hydroxyl groups in minerals, which can be converted into water we drink under certain conditions
.
Looking up at the starry sky, the question of "is there water on the moon" has aroused great curiosity of human beings.
The scientific debate on this issue has lasted for more than half a century
.
On December 1, 2020, the Chang'e-5 probe landed in the northern region of the Ocean of Storms of the Moon, and then returned 1731 grams of lunar samples
.
The Lunar Mineral Spectrum Analyzer acquired spectral data on the lunar surface
.
The scientific debate on this issue has lasted for more than half a century
.
On December 1, 2020, the Chang'e-5 probe landed in the northern region of the Ocean of Storms of the Moon, and then returned 1731 grams of lunar samples
.
The Lunar Mineral Spectrum Analyzer acquired spectral data on the lunar surface
.
In fact, spectrometers measure water by finding distinct absorption signatures of hydroxyl groups or water molecules
.
By analyzing the spectral features around 3 microns, it is possible to identify lunar surface water and obtain the water content
.
.
By analyzing the spectral features around 3 microns, it is possible to identify lunar surface water and obtain the water content
.
Unlike liquid water in the general sense, the "water" detected by the spectrometer on the lunar surface is hidden in the rock.
The water molecules represent the "bound water" that can be released by a little heating, and the hydroxyl group represents the precipitation that requires a higher temperature.
"Structured Water"
.
However, the band coverage of the lunar spectral remote sensing data obtained at present cannot distinguish these two forms of existence
.
The water molecules represent the "bound water" that can be released by a little heating, and the hydroxyl group represents the precipitation that requires a higher temperature.
"Structured Water"
.
However, the band coverage of the lunar spectral remote sensing data obtained at present cannot distinguish these two forms of existence
.
To obtain more accurate data, the researchers thermally calibrated the spectrometer
.
"The lunar surface temperature will even exceed 100 degrees Celsius at local noon, and the thermal radiation generated by the lunar soil will change the spectral shape and mask the characteristics of water, so thermal correction of the spectrum is the key to studying lunar surface water
.
.
"The lunar surface temperature will even exceed 100 degrees Celsius at local noon, and the thermal radiation generated by the lunar soil will change the spectral shape and mask the characteristics of water, so thermal correction of the spectrum is the key to studying lunar surface water
.
The Chang'e-5 spectrometer made spectroscopic observations on an area of about 2 meters square in the sampling area.
In addition to the lunar soil, there was a piece of rock that was not brought back
.
The results of the data analysis add new conclusive evidence that water really exists on the moon: The water content in the Chang'e 5 sampling area is below 120 ppm (120 parts per million), while the water content in the rock is about 180 ppm
.
In addition to the lunar soil, there was a piece of rock that was not brought back
.
The results of the data analysis add new conclusive evidence that water really exists on the moon: The water content in the Chang'e 5 sampling area is below 120 ppm (120 parts per million), while the water content in the rock is about 180 ppm
.
Researchers have analyzed that most of the water in the lunar soil comes from the "carrying goods" of the solar wind
.
There is a lot of hydrogen in the solar wind, which is bombed to the lunar surface and combined with the oxygen in the lunar soil to form hydroxyl or water molecules.
Compared with the 120ppm water content in the lunar soil, there is still 60ppm of water in the rocks.
Where does the extra water come from? The researchers speculate that the rock came from an area older than the local basalt at the Chang'e-5 landing site, and the extra water may represent the lunar interior
.
.
There is a lot of hydrogen in the solar wind, which is bombed to the lunar surface and combined with the oxygen in the lunar soil to form hydroxyl or water molecules.
Compared with the 120ppm water content in the lunar soil, there is still 60ppm of water in the rocks.
Where does the extra water come from? The researchers speculate that the rock came from an area older than the local basalt at the Chang'e-5 landing site, and the extra water may represent the lunar interior
.
Chang'e 6 and Chang'e 7 will continue to detect the content and distribution of lunar surface water at the in-situ and orbital scales.
The research results will also provide support for the realization of the scientific goals of Chang'e 6 and Chang'e 7
.
Chang'e-5 is the only mission so far that not only returns samples but also obtains in-situ spectra of the lunar surface.
The samples can analyze the distribution and existence of water in lunar soil particles in detail, and can use isotopes to trace the source, while in-situ spectra It can establish a connection with orbital remote sensing, and can study the global distribution and time-varying characteristics of lunar surface water
.
The research results will also provide support for the realization of the scientific goals of Chang'e 6 and Chang'e 7
.
Chang'e-5 is the only mission so far that not only returns samples but also obtains in-situ spectra of the lunar surface.
The samples can analyze the distribution and existence of water in lunar soil particles in detail, and can use isotopes to trace the source, while in-situ spectra It can establish a connection with orbital remote sensing, and can study the global distribution and time-varying characteristics of lunar surface water
.
Lunar water research is far from over
.
In the eyes of the researchers, confirming the existence of water on the moon and estimating the amount of water is crucial to the planning and construction of the "Moon Village" and "Lunar Scientific Research Station"
.
This research was completed by the Planetary Science Team of the Institute of Geology and Earth Sciences, Chinese Academy of Sciences in cooperation with the Shanghai Institute of Technical Physics, the National Space Science Center, the University of Hawaii, and Nanjing University
.
.
In the eyes of the researchers, confirming the existence of water on the moon and estimating the amount of water is crucial to the planning and construction of the "Moon Village" and "Lunar Scientific Research Station"
.
This research was completed by the Planetary Science Team of the Institute of Geology and Earth Sciences, Chinese Academy of Sciences in cooperation with the Shanghai Institute of Technical Physics, the National Space Science Center, the University of Hawaii, and Nanjing University
.
Source: Chinese Science Journal
Original title: Spectrometer brings you a close understanding of the "source of life" on the moon
