Questions tagged [mars]

Questions about the science or exploration of the planet Mars.

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How thick would a Marscrete structure need to be to provide adequate protection against radiation?

Regarding a manned shelter on the surface of Mars... With all of this esoteric talk of ice shelters, why not simply create concrete (Marscrete) buildings? The ice probably provides better radiation ...
7
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1answer
575 views

How deep a valley or trench would be needed on Mars to provide the same atmospheric pressure as 6 km above sea level on Earth?

Atmospheric pressure increases the deeper you go & the highest growing plants on Earth have been found at a height of 6 km so how deep a trench would we need on Mars to provide similar air ...
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1answer
2k views

What are the most difficult challenges SpaceX will face getting astronauts to Mars by about 2025?

SpaceX has been announcing very ambitious goals such as starting to send manned missions to Mars in order to (eventually) create a colony, and recently there has been a substantial release of more ...
4
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1answer
326 views

What factors would make station-keeping of an Areostationary Mars satellite necessary?

This answer introduced me to the word Areostationary Orbit - (hint, comes from Ares), an orbit that would remain stationary above a point on the equator of Mars. The article mentions that ...
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1answer
170 views

What series of devices would you need to deliver to the Martian surface to manufacture concrete entirely in-situ?

It seems like you at least need the following: A self-drilling wellhead to reach the subsurface water, storage tank Some process for refining the regolith into the optimal composition, storage tank A ...
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1answer
173 views

Can air pressure be accumulated this way for a biodome or spacesuit?

Using plastic or rubber or something similar and transparent be inflated with each layer having a increasing pressure lessening the strain on the containing material? When one or two layers fails the ...
2
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1answer
172 views

How high could a weather balloon be used on Mars without rupturing? [duplicate]

What is the maximum height could a weather balloon achieve on Mars without rupturing? Assume that the balloon is adapted for Mars' atmosphere and gravity from standard high altitude balloons used on ...
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3answers
561 views

Could a powerful enough laser or maser heat the core of Mars?

I think that if we could build a powerful enough laser/maser to heat the core of Mars up and melt it, it could generate a magnetic field, which would allow for easier living on Mars. Could this be ...
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Why hasn't NASA planted a stationary lab on Mars yet?

Why does NASA send rovers such as Curiosity instead of remotely building a small building on the surface of Mars?
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4answers
1k views

Is current state-of-the-art additive manufacturing (aka 3D printing) good enough to build parts out of Moon/Mars dust?

Additive manufacturing is currently being proposed as a way to greatly decrease the cost of establishing a permanent (robotic or human) presence on the Moon or Mars by sending only 3D printers to ...
6
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2answers
604 views

On building future sustainable Mars habitat

Pertaining to Mars habitation, eventually, could the answer be in burrowing into the ancient volcanoes instead of building the habitation outside in the open? Since Mars does not have magnetic ...
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Would a settlement on Mars need to import Nitrogen?

The air on Earth is about 20% oxygen and about 78% nitrogen. Best case, there seems to be sufficient oxygen (in water) to support colonization in the polar ice caps. What about the other 4/5 of the ...
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3answers
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Does Mars space suit have to be pressurized?

Various sci-fi movies treat Mars atmosphere differently, anywhere between "you just need oxygen rebreather" and "Your eyes will pop out and your head will explode". Meanwhile, I haven't seen any solid ...
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2answers
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What is the cost estimate for a manned Mars mission?

I am looking for a cost estimate for a manned (return) mission to Mars. There is a similar question asking for the cost of the Mars One proposal, but I would be happy with a cost estimate for any type ...
7
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1answer
2k views

Why not a “live” visual connection with Curiosity on Mars all the time?

Note: Got the idea for this question by @uhoh's question: "Has anything close to video ("live" or otherwise) been shot in space from beyond the Moon ? To have the "feeling" of a "live" connection ...
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1answer
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Will colonists on Mars have enhanced physical mobility relative to an Earth-normal environment?

A Princess of Mars (1912) by Edgar Rice Burroughs in Chapter III describes this "superhuman leap" by the hero John Carter: My effort was crowned with a success which appalled me no less than it ...
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5answers
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Would it be possible to deploy a man-made magnetic field in Mars orbit for terraforming? [closed]

I know terraforming Mars has been a topic of discussion for a long time. One of the larger obstacles is the planet's weak magnetic field, which if I understand correctly is integral to containing an ...
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2answers
616 views

What would sounds on Mars be like?

Figure there was a microphone on the surface of Mars, exposed to the atmosphere. If it recorded stuff, how would it sound? E.g. walking through sand, stuff falling down onto rock, a rocket engine, the ...
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1answer
1k views

Are there any proposals for a permanent orbital interplanetary ferry?

I believe I read in a book once a description of a kind of interplanetary ferry that would orbit the sun and regularly pass different planets like Mars and Earth. The idea of the ferry is to have a ...
10
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2answers
917 views

Does the Curiosity rover really have a chance of driving to the top of Mt. Sharp?

This great answer suggests the limiting high altitude to which the Curiosity rover on Mars could drive would be the top of Mt. Sharp (Aeolis Mons) - in the center of Gale crater. I'm wondering, is ...
10
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1answer
7k views

If Mars had more atmosphere how warm would it be?

Looking at Venus, Earth and Mars, the closer you are to the sun the warmer you are. At the same time the warmer planets also have thicker atmospheres. ...
10
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2answers
13k views

How close will the Tesla Roadster with Starman actually get to Mars?

I know the long term outlook is quite difficult to say, but how close will the Tesla Roadster actually get to Mars on it's first orbit around the Sun?
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1answer
703 views

Use of carbon monoxide as propellant on Mars

Is it possible to use carbon monoxide as propellant for a rocket? For example, carbon dioxide from the atmosphere of Mars could be transformed to carbon monoxide and oxygen via photochemical ...
9
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1answer
165 views

What exactly are the recent observations of organics on Mars? What's the data?

There is news of organic molecules on Mars, an event in the press. What exactly are the measurements? I've heard something about atmospheric methane, is this determined from some absorption peaks in ...
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3answers
3k views

How many plants would be needed to produce oxygen enough for 20 humans?

Does it depend on the type of plants and how much sunlight they get too?
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0answers
564 views

How strong is the electric charge capacity of Martian dust storms?

In my answer to What would it feel like to be in a Martian dust storm? I assert that Martian dust storms would be best avoided, and as one of the reasons (besides carrying corrosive chemicals like ...
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1answer
962 views

Sources of radiation on Mars

This question proposes building a satellite to deflect solar ionizing radiation from Mars. But there are two sources of radiation: the sun and 'everything else' (cosmic radiation). How much radiation ...
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3answers
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What happens to defunct lunar and Mars rovers? What technological barriers prevent humanity from creating a perpetual rover?

What happens to defunct lunar and Mars rovers? What technological barriers prevent humanity from creating a perpetual rover with sun batteries or nuclear portable reactors for use on Mars, the Moon, ...
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2answers
9k views

Is it possible to grow plants on Mars?

If we provide adequate water supply will it be possible to grow plants/seeds/moss/algae (from Earth) on Mars? How different are Mars soil from Earth's soil?
20
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1answer
277 views

Rock flipping operation

After the recent announcement of complex organics being found on Mars within the curiosity rover's meager 5cm drill depth, I had an idea about artificially increasing it: Is curiosity rover's arm ...
16
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3answers
4k views

Could “live” video be transmitted from Mars?

With the approach of InSight to Mars today, and the two cubesats watching it, much is being made about seeing "Live Video" from the cubesats. I'm pretty sure that simply can't happen, but I'm ...
15
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4answers
2k views

Can materials be found to make plastic on Mars?

Does Mars contain the materials required to make plastic? If not, can they relatively easily be made, or an adequate substitute found?
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2answers
743 views

How would the search for life on Mars be affected by having boots on the ground?

It is looking like Mars One might continue to go forward, and even if it doesn't it is fairly likely that we will have people on Mars sooner or later. Have there been any scholarly estimations of the ...
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1answer
3k views

Why are Curiosity's wheels aluminum rather than titanium?

I was just reading this article on how Curiosity's aluminum wheels are getting pretty dinged up. Usually titanium alloy is considered an upgrade from aluminum alloys in most applications, from ...
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2answers
2k views

What's the reasonable “window” in days for a Mars-Earth Hohmann transfer?

As any popular science reader knows, when traveling between Earth and Mars, there's a Hohmann transfer opportunity about every two years (I believe it's every 26 months, specifically). What I've ...
10
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3answers
657 views

Why is MOM in a very retrograde orbit?

A recent question/discussion on this site brought out the interesting fact that most probes around Mars are in Sun synchronous near polar orbit. The ISRO web-site for the Mars Orbiter Mission writes ...
9
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2answers
304 views

Least artificial gravity needed to maintain health on a one year space trip?

What is the least gravity needed for human health on a one year space trip?
9
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1answer
370 views

What's the current timeline for NASA's Mars orbiter laser communications?

Dr. Jim Green, Director, NASA Planetary Science Division, mentioned during his "The Martian": Science Fiction & Science Fact talk for the 18th Annual International Mars Society Convention (you can ...
7
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3answers
828 views

Is SpaceX already researching, planning or designing, structures for Mars colonies?

Pretty much what the question states, is SpaceX doing early work on that aspect of Mars' colonization or are they at the moment giving full focus to the launch system, craft and lander? (which would ...
7
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1answer
804 views

Will Santa Claus deliver presents to Mars in 2025? [closed]

Recently, CNN informed us that Mars One seems to still be on track for landing on Mars in 2025. If this is the case, we may have humans celebrating the first Christmas on Mars of all time. Since this ...
7
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2answers
541 views

What is the deepest place on Mars? Do humans need pressurized suits there?

Is there any particular deep area, trench, fissure, lava tube or otherwise on of Mars in which a person could survive with only an oxygen supply? How deep would plants or animals have to be in Mars ...
6
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1answer
4k views

How deep into space will the live feed from Starman remain active?

Assuming they keep it streaming for us to watch, at what distance will it no longer broadcast?
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2answers
3k views

How could a trip to Mars benefit from a “Distant (Lunar) Retrograde Orbit” DRO?

This guest blog text by Martin Elvis mentions a kind of orbit which I've never heard of before. How does the orbital mechanics work so that a DRO could benefit an interplanetary mission? ... ...
5
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1answer
810 views

Launch windows to Mars

I just watched a National Geographic documentary on ExoMars. In it, they mentioned there were 2 launch windows in early 2016 for the TGO/Schiaparelli launch, one in January and one in March. Quote ...
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3answers
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Are Martian winds as strong as portrayed in “The Martian”?

I read Andy Weir's "The Martian" and saw the movie, which is supposed to be realistic science fiction. And I immediately saw a couple of huge flaws, one of which I'd like to tackle with this question: ...
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2answers
472 views

MOM's NOT-so-sun-synchronous orbit about Mars - how large is it's J2?

edit: See my supplementary answer below for additional information. @Hohmannfan nailed it. This question and answer started me wondering - how big is the J2 (oblateness) term of Mars' gravity ...
3
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0answers
247 views

What will MOM do when Earth isn't looking?

A quick follow-up to Is each instrument on ISRO MOM independently in 24x7 contact with Earth? Every 26 months Sol interposes to occult Earth from the gaze of the Warlord. The last time this occurred ...
3
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2answers
375 views

Are not crash landings on Mars violating the Planetary Protection rules?

Are not the chances considerable that the crash landing of the Schiaparelli lander has contaminated the subsurface of Mars with microbes ? For Mars there are 3 categories of Planetary Protection ...
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2answers
338 views

Artificial Magnetosphere to Terra-form Mars?

I was reading a 2017 article on a potential that Mars could be terraformed using a magneto-tail; A Future Mars Environment for Science and Exploration. This would basically entail sticking a giant ...
24
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1answer
26k views

How many active or inactive artificial satellites are in Mars orbit?

I just read in the BBC news that four nations have placed satellites in Mars orbit. How many active or inactive artificial satellites are there in orbit around Mars (2014)?