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25 maj 2022 · Study led by UChicago scientist deepens mystery about climate of early Mars. Mars once ran red with rivers. The telltale tracks of past rivers, streams and lakes are visible today all over the planet. But about three billion years ago, they all dried up—and no one knows why.
30 mar 2017 · Solar wind and radiation are responsible for stripping the Martian atmosphere, transforming Mars from a planet that could have supported life billions of years ago into a frigid desert world, according to new results from NASA’s MAVEN spacecraft.
5 wrz 2019 · A key tracer used to estimate how much atmosphere Mars lost can change depending on the time of day and the surface temperature on the Red Planet, according to new observations by NASA-funded scientists. Previous measurements of this tracer – isotopes of oxygen – have disagreed significantly.
The loss of a large fraction of its atmosphere to space was a major cause of Mars’s transition from a warm, wet climate to today’s cold, dry one. In contrast, the fact that the Earth retained its magnetic field, which deflects the solar wind, and hence held on to its atmosphere, ultimately allowed life to develop here. Read more:
1 lip 2019 · The flows would have to be significant to leave surface features because the temperatures and pressures on Mars’ surface today mean water quickly evaporates once it reaches the surface. So if...
5 lis 2015 · After looking at the first six months of data collected by NASA’s MAVEN spacecraft, sent to Mars to monitor its upper atmosphere, scientists say the solar wind has stripped away most of its...
17 wrz 2023 · The atmosphere of Mars changes over the course of a day because the ground gets extremely cold at night on Mars, down to around minus 160°C.
