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6 wrz 2024 · Seasonal changes can have a dramatic effect on how quickly Mars loses its water to space, a joint study between the Hubble Space Telescope and NASA's Mars Atmosphere and Volatile Evolution...
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 2024 · Hubble and MAVEN showed that Martian atmospheric conditions change very quickly. When Mars is close to the Sun, water molecules rise very rapidly through the atmosphere, breaking apart and releasing atoms at high altitudes.
5 lis 2015 · Since Mariner 4 flew by Mars more than five decades ago, scientists have understood the red planet to be a cold, dry world. Now they know why.
This process was quick because the Sun rotated much faster in its youth, which made the solar wind more energetic. 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.
22 mar 2021 · The findings show that Mars loses the equivalent of a global two-metre-deep layer of water every billion years. However, even accumulated over Mars’ four-billion-year history, this amount is insufficient to explain where all of Mars’ water has gone.
25 mar 2024 · The period that liquid water was present on the surface of Mars may have been shorter than previously thought. Channel landforms called gullies, previously thought to be formed exclusively by liquid water, can also be formed by the action of evaporating CO2 ice.
