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 by Staff Writers Beijing (XNA) Mar 04, 2021
The China National Space Administration made public on Thursday morning the first high-definition pictures of Mars taken by the nation's spacecraft. The pictures - two black-and-white and one color - were shot recently by China's Tianwen 1 robotic probe when the spacecraft was travelling in Mars orbit, according to the administration. The two black-and-white 7-meter-resolution images were taken by the high-definition camera on Tianwen 1's orbiter when the probe was about 330 to 350 kilometers above the Martian surface. Craters, mountain ridges and sand dunes on the red planet are clear on the pictures. The color picture was generated by another camera on the orbiter, showing Mars' north pole. Source: Xinhua News Agency
HKU planetary scientists discover evidence for a reduced atmosphere on ancient Mars Hong Kong (SPX) Feb 17, 2021 Both Earth and Mars currently have oxidising atmospheres, which is why iron-rich materials in daily life develop rust (a common name for iron oxide) during the oxidation reaction of iron and oxygen. The Earth has had an oxidising atmosphere for approximately two and a half billion years, but before that, the atmosphere of this planet was reducing - there was no rust. The transition from a reduced planet to an oxidised planet is referred to as the Great Oxidation Event or GOE. This transition was a ... read more
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