Questions tagged [mars]

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Thickening Mars's Atmosphere

if we were to send a mission to mars (unlimited budget WE WISH!) to explore different methods that would enable us to thicken the martian atmosphere, what different types of data should this mission ...
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Possible and probable source of Curiosity Rover's $\small\sf{CH_4}$ detection on Mars

Past week, NASA announced Curiosity Rover measured 21 ppbv of $\small\sf{CH_4}$ on Mars. This week, NASA's Curiosity Mars rover found a surprising result: the largest amount of methane ever ...
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What could be causing microseisms on Mars?

The anouncement published in Science Mini tremors detected on Mars for first time says that the Mars lander InSight is detecting microseisms on Mars after various vibrations produced by the lander and ...
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What do the little flags on these martian wind speed data points mean?

According to this answer the weather at the InSight lander on Mars can now be seen online at https://mars.nasa.gov/insight/weather/ This includes the wind speed and I believe the direction (if that's ...
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Formation of Hematite on Mars via Perchlorates as an Oxidizer

Hematite on Mars is generally thought to have formed either in pools of water or from volcanic activity. A comment to the answer to the question: How do hematite and magnetite form? states that ...
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Carbon Isotopic Ratio of Methane on Mars

I was wondering, if we measured the carbon isotopic ratio of methane on Mars and found that it was very negative (i.e. it contained more carbon-12 than carbon-13), would this provide definitive proof ...
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Methane Reservoir

Analysis from the Curiosity Rover on Mars has detected tiny amounts of methane in the atmosphere. It is possible the origin of this detected methane is from methanogens deep below the subsurface. My ...
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1answer
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Methane in Martian Soil

Measurements taken by the Curiosity rover have detected minute amounts of methane in the Martian atmosphere. I was wondering, is it possible that greater amounts of methane are present beneath the ...
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Water on Mars and Earth

If water on Earth came from meteorites, why doesn't Mars have substantial water? What made it more highly probable on Earth than on Mars?
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What are Ordovican trace fossils, and what do they look like?

There are some unusual structures in recent images from the Mars Curiosity Rover's MAHLI (Mars Hand Lens Imager) shown in the Space.com article Curiosity Rover Spots Weird Tube-Like Structures on Mars....
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What is serpentinization, in the context of disappearance of surface water on Mars?

The recent paper in Nature The divergent fates of primitive hydrospheric water on Earth and Mars (Nature 552, 391–394 (21 December 2017) doi:10.1038/nature25031) has been linked by many recent news ...
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What are the most similar Earth analogues to Mars' seasonally recurring slope linea?

Recurring Slope Lineae (RSL) on Mars are suggested to be water that seasonally melts from underground ice and sublimates through the sand and dust to darken the surface. Slowly flowing downhill to ...
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Carbon dioxide on Mars, Venus and Earth

Earth's atmosphere is 0.038% carbon dioxide. Mars's atmosphere is 95.3% carbon dioxide. Venus's atmosphere is 96.5% carbon dioxide. If Earth's climate is controlled by CO2, then why is Mars so cold ...
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322 views

Composition of Martian Crust

Does the composition of the crust of Mars roughly correspond to that of the crust of Earth. That is, is the elemental abundance in decreasing order silicon, oxygen, aluminum, etc.?
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Strange circular structures found on a photo from Mars rover Curiosity at Dingo Gap

What are all these gaps / circular structures found on a photo taken by Mars rover Curiosity at Dingo Gap? Have a look at the image I made to see what gaps I mean. (I know the quick paint job looks ...
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How long would it take for Mars to cool after asteroid impact? [closed]

As someone interested in terraforming, the main obstacle to colonizing Mars is the lack of a magnetosphere and Atmosphere. To create a magnetosphere of sufficient magnitude the Martian core must be ...
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Can miniature shells be seen in Earth's sand at this resolution?

Most of sand on Earth when inspected at close range reveal tiny shells as in sea shells. Here is a picture of the Martian sand at a close distance: Can Earth's tiny shells be seen in sand at ...
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How are natural specimens, such as ‘Moqui Marbles’, distinguished from man-made artifacts?

If a particular type of rock specimen is found throughout Earth and is made entirely of natural minerals, but the individual specimens differ minutely from another in size and shape and look to be ...
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How long would it take for earth's core to cool down and solidify?

Would earth go the same way as Mars by first losing its magnetic field followed by its atmosphere as its core solidifies and cools down ? At what rate is the earth's core cooling down?. Is it slow ...
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What is this strange feature on Mars in Valles Marineris

While I was browsing Mars on Google Earth, I stumbled upon an interesting feature on one of the slopes of Valles Marineris. The feature seems unique in the sense that I couldn't find any similar ...
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Why does Mars' experience an 'ice age' at high axis obliquity, when Earth experiences an ice age at low axis obliquity

This paper here goes into some detail about how Mars' experiences its own form of 'ice ages' on a quasi periodic basis driven by the wobbling of its axis. The main mechanism outlined is that the ...
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Is Mars' mantle homogeneous or heterogeneous and what might this say about mantle convection?

A supervisor of mine made an off-hand comment about the fact that Mars used to have plate tectonics, and there is evidence that Mars used to have plate tectonics, however now it does not. The theory ...