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China’s lunar rover discovers mysterious material on far side of Moon

China’s lunar rover discovers mysterious material on far side of Moon
20.09.2019 14:00

Yutu-2, the lunar rover for China's Chang'e-4 mission, grabbed attention last month after its drive team spotted some unusual "gel-like” material while roving close to a small crater, Trend reports citing Sputnik.

The Chinese-language science outreach publication Our Space, which announced the findings on August 17, used the term "胶状物" (jiao zhuang wu), which can be translated as "gel-like," Space.com reported. This notion sparked wide interest and speculation among lunar scientists. Along with new images of the stuff on the moon, the post released over the weekend by Chinese-language science outreach publication Our Space via its WeChat social media account details how the Yutu-2 team carefully approached the crater in order to analyze the specimen, despite risks.

One of the images shows two of the rover's six wheels and the contents of an approximately 7-foot-wide (2 meters) crater. The green, rectangular area and red circle within are suspected to be related to the field of view of the Visible and Near-Infrared Spectrometer (VNIS) instrument, rather than the subject matter itself, according to some lunar scientists.

After obtaining the first set of data that VIRS, one of Yutu-2's four science payloads, collected at the crater in July, the Yutu-2 team deemed it to be unsatisfactory due to shadows, so the team members attempted a second approach and measurement during the following lunar day in August. According to Our Space, satisfactory detection was made — but the results were not released.

Clive Neal, a lunar scientist at the University of Notre Dame, told Space.com that while the image is not great, it may still give clues to the nature of the material. According to Neal, the material highlighted in the centre of the crater resembles a sample of impact glass found during the Apollo 17 mission in 1972. Sample 70019 was collected by astronaut Harrison Schmitt, a trained geologist, from a fresh crater 10 feet (3 meters) in diameter, similar to that approached by Yutu-2.

Neal describes 70019 as being made of dark, coherent microbrecci, which are made of broken fragments of minerals cemented together - and black, shiny glass. "I think we have an example here of what Yutu-2 saw," Neal said.

 

Such materials could exist after high-speed impacts on the lunar surface, which tend to melt and redistribute rock across the craters they make and can create glassy, igneous rocks and crystalline structures.

Dan Moriarty, NASA Postdoctoral Program Fellow at the Goddard Space Flight Center in Greenbelt, Maryland, also said that it is hard to make a definitive assessment of the substance's chemical composition, outlining that the material appears somewhat brighter than the surrounding materials, though the actual brightness is hard to confirm from the photographs.


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