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Samples from China mission show Moon 'active' more recently than thought
By Jing Xuan TENG
Beijing (AFP) Oct 19, 2021

The first lunar rocks brought back to Earth in decades show the Moon was volcanically active more recently than previously thought, Chinese scientists said Tuesday.

A Chinese spacecraft carried lunar rocks and soil to Earth last year -- humanity's first mission in four decades to collect samples from the Moon, and a milestone for Beijing's growing space programme.

The samples included basalt -- a form of cooled lava -- from 2.03 billion years ago, scientists found, pushing the last known date of volcanic activity on the moon closer to the present day by as much as 900 million years.

Analysis of the samples "reveals that the Moon's interior was still evolving at around two billion years ago", the Chinese Academy of Sciences (CAS) said in a statement.

Previous moon rocks brought back by US and Soviet missions showed evidence of lunar activity up to 2.8 billion years ago, but left a gap in scientists' knowledge about the more recent history of Earth's natural satellite as they were from older parts of the lunar surface.

The Chang'e-5 mission -- named after a mythical moon goddess -- collected two kilogrammes (4.5 pounds) of samples from a previously unexplored area of the moon called Mons Ruemker in the Oceanus Procellarum or "Ocean of Storms".

The area was selected as it was thought by scientists to be more recently formed, based on the lower density of craters from meteors on its surface.

"Altogether those results are extremely exciting, providing amazing science and results on understanding the lunar formation and evolution over time," Audrey Bouvier, a planetology professor at Germany's University of Bayreuth, said in a video message at a Beijing press conference on Tuesday.

The latest findings -- published in three papers in the Nature journal on Tuesday -- open up new questions for scientists trying to decipher the history of the Moon.

"How did the Moon sustain volcanic activity for so long? The Moon is naturally small and should disperse heat quickly, or so the thinking goes," CAS researcher Li Xianhua, one of the authors of the studies, told reporters.

The Chang'e 5 samples marked a major step for the Chinese space programme, which has sent a rover to Mars and landed another craft on the far side of the Moon.

The country, racing to catch up with the United States and Russia, sent three astronauts to its new space station on Saturday, which is expected to become operational by 2022.


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MOON DAILY
Mixing system prototype for future greenhouses on the Moon
Bremenw, Germany (SPX) Oct 18, 2021
Developing greenhouse systems is of great importance and requires Bio-regenerative Life Support Systems (BLSS) to ensure that the lives of crew members are sustained. Two new prototypes of a nutrient mixing system for future Moon and Mars greenhouse modules have now been completed and installed following a successful design and development phase between Priva and the German Aerospace Center (Deutsches Zentrum fur Luft- und Raumfahrt; DLR) that lasted over a year. Tests of the promising systems are comme ... read more

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