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AuAl 2 is the most thermally stable species of the Au–Al intermetallic compounds, with a melting point of 1060 °C (see phase diagram), which is similar to the melting point of pure gold. AuAl 2 can react with Au, therefore is often replaced by Au 2 Al, a tan-colored substance, which forms at composition of 93% of Au and 7% of Al by mass.
The claim that the Great Wall of China is the only man-made object visible from the Moon or outer space has been debunked many times, but remains a common misconception in popular culture. [1] [2] [4] According to astronauts Eugene Cernan and Ed Lu, the Great Wall is visible from the lower part of low Earth orbit, but only under very favorable ...
Xuntian (Chinese: 巡天; pinyin: Xúntiān; lit: Tour of Heaven), [a] also known as the Chinese Space Station Telescope [5] (CSST) (Chinese: 巡天空间望远镜; pinyin: Xúntiān Kōngjiān Wàngyuǎnjìng) is a planned Chinese space telescope currently under development.
China’s first manned space mission in 2003 made it the third country after the former Soviet Union and the U.S. to put a person into space using its own resources.
China's Global Times reported that its 500-meter (1,600 foot) FAST telescope will be open to the global scientific community starting in April 2021 (when applications will be reviewed), and becoming effective in August 2021. Foreign scientists will be able to submit applications to China's National Astronomical Observatories online. [47] [48]
Before the early 1800s, aluminum had not been produced as an isolated metal. It wasn't until 1825 that; Hans Christian Ørsted discovered how to create elemental aluminum via the reduction of aluminum chloride. Since aluminum is a light element with good mechanical properties, it was widely sought to replace heavier less functional metals like ...
For all of NASA’s high-tech advancements, it may surprise you to know that the agency used regular kitchen aluminum foil to save one of its most famous missions.
By Farah Master. HONG KONG (Reuters) - China's state security ministry said foreign spy intelligence agencies have been trying to steal secrets from the country's space programme as the arms race ...