NASA proposes a magnetic shield to protect Mars' atmosphere
NASA proposes a magnetic shield to protect Mars' atmosphere
NASA proposes a magnetic shield to protect Mars' atmosphere
Space Exploration
Mar 3, 2017
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Despite the absence of a global Earth-like magnetic dipole, the Martian atmosphere is well protected from the effects of the solar wind on ion escape from the planet. New research shows this using measurements from the Swedish ...
Space Exploration
Dec 8, 2017
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Approximately every two Earth years, when it is summer on the southern hemisphere of Mars, a window opens: Only in this season can water vapor efficiently rise from the lower into the upper Martian atmosphere. There, winds ...
Space Exploration
May 10, 2019
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A NASA spacecraft's six-month journey to Mars neared its dramatic grand finale Monday in what scientists and engineers hoped would be a soft precision landing on flat red plains.
Space Exploration
Nov 26, 2018
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With the launch period of NASA's Mars 2020 Perseverance rover opening in 14 weeks, final preparations of the spacecraft continue at the Kennedy Space Center in Florida. In the past week, the assembly, test and launch operations ...
Space Exploration
Apr 10, 2020
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3431
In 1966, two Caltech scientists were ruminating on the implications of the thin carbon dioxide (CO2) Martian atmosphere first revealed by Mariner IV, a NASA fly-by spacecraft built and flown by JPL. They theorized that Mars, ...
Astronomy
Jan 29, 2020
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The tunable laser spectrometer in the SAM (Sample Analysis at Mars) instrument of the Curiosity robot has unequivocally detected an episodic increase in the concentration of methane in Mars' atmosphere after an exhaustive ...
Space Exploration
Feb 27, 2015
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An unexpectedly strong blast from the Sun hit Mars this month, observed by NASA missions in orbit and on the surface.
Space Exploration
Sep 30, 2017
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The mystery of some lava-like flows on Mars has been solved by scientists who say they are caused not by lava but by mud.
Space Exploration
May 18, 2020
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Solar panels against an alien landscape, ramps and rods pointing at the Martian horizon—China's first probe on the Red Planet has beamed back its first "selfies" after its history-making landing last week.
Space Exploration
May 19, 2021
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656
Mars, the fourth planet from the Sun, has a very different atmosphere than that of the Earth. There has been much interest in studying its composition since the recent detection of a small amount of methane, which may signal life on Mars; it could also be a geochemical process or the result of volcanic or hydrothermal activity.
The atmosphere of Mars is relatively thin, and the atmospheric pressure on the surface varies from around 30 Pa (0.03 kPa) on Olympus Mons's peak to over 1155 Pa (1.155 kPa) in the depths of Hellas Planitia, with a mean surface level pressure of 600 Pa (0.6 kPa, or 6 millibars, or 0.087 psi), compared to Earth's 101.3 kPa, and a total mass of 25 teratonnes, compared to Earth's 5148 teratonnes. However, the scale height of the atmosphere is about 11 km, somewhat higher than Earth's 7 km. The atmosphere on Mars consists of 95% carbon dioxide, 3% nitrogen, and 1.6% argon, and contains traces of oxygen, water, and methane, for a mean molecular weight of 43.34 g/mole. The atmosphere is quite dusty, giving the Martian sky a tawny color when seen from the surface; data from the Mars Exploration Rovers indicate that the suspended dust particles are roughly 1.5 micrometres across.
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