Questions tagged [mars]

Questions regarding Mars, the fourth planet from the Sun.

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2
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1answer
36 views

How can I find the depth of a portion of the Valles Marineris?

How can I find the depth of the low lying part of this image of the western part of Valles Marineris? I'm interested in the area northeast of Noctis Labyrinthus, southwest of Tithonium Chasma, north ...
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1answer
49 views

How does the surface gravity on Mars vary between the equator and its poles?

A day on Mars is similar in length to the Earth's day. On Earth, due to rotation, the surface gravity varies from 9.78 m/s² (0.997 g) on the equator to 9.832 m/s² (1.003 g) on the poles. I wonder how ...
7
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1answer
466 views

Are Tharsis Montes and Hellas Basin a result of the same event?

Looking at Mars map: the highest, biggest mountains and their associated highlands are essentially antipodes of the deepest, huge basin. Roughly 180 degrees away, similar latitude except opposite ...
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0answers
54 views

Orbitally convenient Mars-to-Earth transit times?

Are there any peculiar solar system layouts that would result in highly efficient transits between Mars-to-Earth? I am aware of a Hohmann transfer orbit, but can other planets be used to "sling-shot" ...
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0answers
75 views

What is the surface feature of the mesas in the Noctis Labyrinthus on Mars?

Caveat-my knowledge of geology is limited. Is it known what is the surface like on the larger mesas in the Noctis Labyrinthus? I trust the very smooth looking surface on this mesa is a product of ...
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1answer
43 views

Is there a general term used to identify the high flat features within Noctis Labyrinthus on Mars?

At the western end of Valles Marineris, where it mets Noctis Labyrinthus (highlighted section of image) there are a series of flat geological formations between the canyons. Is there a unique term ...
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2answers
168 views

Why are we so quick to proclaim the geological inhospitability of other planets based on extremely minimal information?

Now, I'm not questioning claims that any planet in the Solar System is atmospherically or externally inhospitable, but claims made that other planets have geology that is extremely hostile to ...
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1answer
493 views

At Mars' equator how long does twilight last?

With Mars' thinner atmosphere I'm assuming twilight would not last as long compared to the duration on Earth. Has there been any determination of the length of twilight on Mars at the equator or any ...
3
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0answers
30 views

Would Martian sunrise/sunset look the same at the Thaumasia Plateau as the rovers' photographs?

If observing the sunrise or sunset, with the naked eye, from the Thaumasia Plateau (app. 260°, -10°), 6 kilometers above Mars elevation zero, would it have the same blue hue as the images of the ...
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2answers
200 views

Are meteors visible on Mars?

If a person were standing on the surface of Mars, under ideal viewing conditions for seeing a meteor: no clouds, the sun has long set, would a meteor be visible to the naked eye considering how thin ...
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3answers
139 views

How long is the Sun closer to Earth then Mars is?

A recent question at Space.se has generated a few comments that are interesting. But the answer to one particular comment to might address a lot of misconceptions. I imagine the actual halfway ...
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1answer
23 views

How can I download all of this JPL MRO imaging data at once?

There are several files. I think that they all needs to downloaded to have the complete dataset. Is there a particularly good way to download them all in one shot? https://pds-imaging.jpl.nasa.gov/...
3
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1answer
93 views

How was Cassini able to measure and use the Earth-Mars distance to get the Earth-Sun distance?

How was Cassini able to measure and use he distance between Earth and Mars to get the Earth-Sun distance? How were the ratios of Earth-Mars and Earth-Sun calculated then? Given Kepler's laws all we ...
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3answers
10k views

Why is Mars cold?

The surface temperatures of Mars are about -87C to 5C, which is much colder than that of Earth's. If Mars has 95% carbon dioxide, which is a Greenhouse gas, why is the surface of Mars so cold? ...
8
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2answers
260 views

Why is ice on Mars not covered in dust?

There's exposed water ice on Mars, like in craters like this At the same time, Mars has dust storm, covering the solar panels of rovers, and occasionally covering the entire planet So why is this ...
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2answers
213 views

How much volume of gases could be added to Mars atmosphere that the planet gravity can retain?

This article Mars atmosphere states that Today Mars atmosphere is very thin, but it was not always like this. Around 3.5 billion years ago, the red planet had a thick enough atmosphere for liquid ...
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1answer
145 views

Is it possible that Venus was once a rogue planet? [closed]

As Venus rotates in clockwise direction, while other planets rotate in anti clockwise direction: Is it possible that Venus was once a rogue planet?
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1answer
181 views

Why don't we see evidence of glaciation on Mars, similar to Earth's Ice Ages?

With all recent NASA activity surrounding Mars manned missions, it is surprising that given Mars orbital distance from Sun that there is not evidence of massive glaciation similar to Earth's Ice Ages. ...
6
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1answer
97 views

Why do transits of Earth across the Sun seen from Mars follow a pattern of occurring after 26, 79 then 100 years?

According to this answer transits of Earth across the disk of the Sun as seen from Mars: The (Arthur C.) Clarke story is quite correct. Earth (and Moon) would transit the sun from the viewpoint of ...
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1answer
154 views

If the Mars polar caps were melted, how deep would the oceans be?

If the Martian polar ice caps melted, given a surface temperature and pressure that allow for liquid water, how large would the oceans be? Would they match their ancient glory, or would they be ...
3
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1answer
88 views

Custom telescope

I am currently trying to make a Keplerian telescope from "scratch" with plano-convex lenses bought online. I have found my objective and eyepiece lenses. I'm just not sure if they will suffice to ...
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2answers
94 views

What is the temperature about 10 or 15 feet below Mars' surface?

I was wondering this for a school paper I'm writing.
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1answer
89 views

Why are cirrus clouds more common on Mars?

Mars water ice clouds are often associated with regional- to-global circulation and saturation conditions, as opposed to local convective overturning, and so typically exhibit cirrus rather than ...
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2answers
5k views

What detail can Hubble see on Mars?

I'm researching a scene for a sci-fi novel in which the near-future protagonists observe earth through a station-mounted telescope in Mars orbit. My goal is to understand how much detail they ...
3
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2answers
143 views

Why is only a narrow chunk of sky darkened in this amazing Curiosity solar eclipse GIF from Mars?

I found three NASA JPL images in the sequence PIA23133, PIA23134, and PIA23135. They were taken by the Curiosity Rover on Mars and show solar eclipses by Mars' two moons. Details of these images are ...
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1answer
51 views

Does Mars' “Northern ocean” have another name? What about the “Inland Sea”?

The March 15, 2019 Phys.org article A NASA spacecraft may have explored the edges of an early Mars sea in 1997 shows a stylized map of an area on Mars where the Mars Pathfinder landed and uses colors ...
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21 views

Underground cave in Mars' Armstrong limit [duplicate]

Can a cave, fissure, volcano vent etc. exist on Mars with in the Armstrong limit and support plant life if light and soil was provided? I am not asking how deep is the Armstrong limit of Mars rather ...
2
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1answer
379 views

Could Mars have oil?

What events could have to happen to Mars (which is thought to once look like Earth) that may have depleted the atmosphere and erase all proof of life ever existing at least on the surface? I know an ...
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0answers
105 views

Is the water on Mars drinkable? [closed]

Could water from Mars be fresh enough to drink? Could one run the water through a home water filter? I understand when water is frozen the salt is ejected as brine so would newly formed snow or ice be ...
2
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1answer
83 views

Historical Distance of Planets to Earth [duplicate]

I'm curious if there is a readily accessible tool available, or simply a reliable way to find out what the distance of the planets in the solar system were on a given date. For example, if I am ...
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1answer
91 views

What's the proportion of Mars' surface compared to Earth's surface uncovered of water?

How does Mars surface compare to Earth's surface? Mars is quite smaller than Earth, but most Earth's surface is covered with water. I thought making the math could be relatively easy but Earth isnt a ...
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1answer
92 views

Could a rocky rogue planet get trapped in the orbit between Earth and Mars?

I know it's extremely unlikely a rogue planet passing by there, and I know the size of rocky planets can vary a lot (IIRC there is a rocky planet 5 times the size of Earth) but in any hypothetical ...
3
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1answer
222 views

What causes Titan a moon to have a denser atmosphere than that of a Mars?

I'm wondering about Mars and Titan. If Mars is larger than Titan how come it lost most of its atmosphere? Mars also has a magnetic field while Titan doesn't. Yet Titans atmospheric pressure on the ...
3
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1answer
159 views

Any information on the salt content of Mars' atmospheric dust?

Answers to and comments on How to drink water on Mars? suggest that one would not want to drink melted water ice obtained from exposed surface deposits near the poles because it may contain various ...
3
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1answer
449 views

Would drinking melted ice water from Mars taste like sparkling water?

Does water on Mars form from the atmosphere as ice free from salt? Does water desalinize through the evaporation and transpiration? When the fresh top ice is placed in a container then pressurized to ...
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1answer
68 views

Will the shape of the constellations change if we observe from another planet, say Mars? [duplicate]

Constellations are dominant features of night sky. But these are basically group of stars that forms particular shapes when viewed from Earth. How much the shape of a constellation will change if we ...
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1answer
100 views

I need help getting mars to look like a circle

I am having a lot of trouble getting a sharp image in my telescope. It is a skywatcher with a focal length of 1200mm and a diameter of 254mm. I have a laser colimater that I got for Christmas, so I ...
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0answers
33 views

How much is usually deposited in a Mars regional dust storm?

Is there any indication of how much dust is deposited, especially in areas that are not open where wind might produce a cleaning event?
2
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1answer
76 views

What are the characteristics of solid carbon dioxide on the Martian poles?

When carbon dioxide forms on Mars is it like ice or snow? How dense is newly formed solid carbon dioxide? Would more carbon dioxide form inside a pit vs a flat plain? How thick or deep does solid ...
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2answers
171 views

Is Titan Better or Mars? [closed]

Isn't Titan better to colonize than Mars? It has a thick atmosphere which is made up of nitrogen like our planet's. It doesn't have a magnetic field, but it does get a type of protection from Saturn. ...
3
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1answer
94 views

Current delay for radio signals from the Mars InSight mission

I've been meaning to post it on the day when InSight landed but just got around to it now. When they broadcasted landing in real-time, it really wasn't in real-time because radio signals from Mars ...
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1answer
343 views

Can't see any detail on planets with my new Celestron NexStar 130 SLT Computerized Telescope [duplicate]

Mars looks like a small white blob/circle and the same with all other planets. This is very frustrating. I've looked all over for a solution jumping from site to site and nothing. Please be different ...
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0answers
61 views

Help understanding the false MRO observations of hydrated minerals on Mars

The Science News article An orbiter glitch may mean some signs of liquid water on Mars aren’t real begins: Some signs of water on Mars may have just dried up. Thanks to the way data from NASA’...
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1answer
73 views

What would happen to a woman who was teleported to mars while wearing a dress and skirt [closed]

I know that there is very little O2 on mars, very little pressure, and very cold temperature, but what would kill her first-suffocation, exploding, boiling body fluids, or exploding?
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1answer
193 views

Mars vs Venus: the retention of atmospheres in relationship to Earth

Correct me if I'm wrong, but the factors than enable a planet to retain or lose an atmosphere seem to be: 1. Magnetic Field, 2. Solar Winds, 3.Weight of Gases, 4. Planetary Temperatures. 5. Distance ...
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4answers
938 views

Mars looks like a blur

I took my telescope out tonight (I am new, just got the telescope a few days ago, it's my first one) and I was observing Mars, however all I see is just an bright orange circle, with no surface detail,...
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1answer
48 views

How thick or deep does solid carbon dioxide accumulate on Mars?

On Mars is there an area in which all the $CO_2$ evaporates exposing dirt near the pole? How deep can solid $CO_2$ accumulate during winter in that area during the Martian Winter? https://space....
12
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1answer
303 views

How would astronomical seeing on Mars differ from that on Earth?

Astronomical seeing is the limiting factor for the resolution of all but the smallest Earthbound telescopes. Source Stunning advances in adaptive optics (along with it's predecessor speckle ...
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2answers
505 views

What magnification is required to see detail on Mars / other local bodies?

I have a 125mm Jones Bird newtonian telescope (very shoddy) with 6x lens (2× + 3×) essentially we were able to see a very small O (yeah that's to scale) with varied shades of red. Is Mars far away ...
2
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1answer
143 views

Has the Mars dust storm affected its naked-eye appearance?

Mars has been undergoing a planet-wide dust storm for a couple of months now. By my eye, while Mars currently looks a bright and handsome orange, there's been no change that I've been able to notice ...