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Questions tagged [mars]

Questions about the science or exploration of the planet Mars.

9
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2answers
222 views

Is it possible to extend high speed data transmission with lasers to the distance Earth to Mars?

Data transmission using an optical laser between ground station and a GEO satellite may offer very high data rates, up to 1.8 GBit/s for instance. But what about a transmission from Earth to Mars ...
4
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2answers
216 views

Fast spining solar cells to clear Martian dust possible?

I've seen a fast spinning glass wheel used in front of a camera to clear away water, dust or ice. Could Solar panels be made circular and spin to clear dust off of them in the same way may? As ...
22
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1answer
25k 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)?
-1
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1answer
91 views

Could a Rotary Rocket charge a super capacitor while descending on Mars?

Could a rotary rocket entering the atmosphere collect enough energy in a super capacitor through the rotors (along with auto rotation) while descending to have a controlled landing in the last few ...
0
votes
1answer
42 views

Could a solar panel be modified to also collect a static charge on Mars?

I was waiting for someone to piece both of these questions together into another question. @Dragongeek was the first, Could a solar panel be modified to create a static charge while spinning to remove ...
3
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2answers
103 views

How many spy satellites could be destroyed before the debris field would be too massive to launch moon or mars manned missions?

Obviously this is very statistical. Basically I'm looking for an order of magnitude. One geostationary satellite would cause a pinball effect or would it be more like 10 satellites? I'm concerned ...
2
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2answers
113 views

Could electricty be generated from a Martian dust storm?

This helicopter is producing static electricity from the blades moving through the dusty air. Along with the electricity provided by wind generators could additional power be created this way from ...
2
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0answers
72 views

Could the BFR Tanker be used as an artificial gravity counterweight for interplanetary travel?

An alternative storyline to the Mars transport architecture: Tankers refuel starship, last Tanker gets mounted on the Starship for the Mars orbital injection burn, once on a Martian trajectory tanker ...
1
vote
2answers
185 views

Could an Igloo work on Mars?

Could ice make a good habitat like an igloo for colonists or as cold storage for fuel? Could the cavern be sealed and then carbon dioxide melted to create pressure inside the cavern to grow plants or ...
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 ...
42
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5answers
14k views

Why aren't we sending quadcopters to mars?

After watching the MARS series on National Geographic I noticed that they sent one of their crew members down a chasm to check for ice. I wondered, why they did not just take a regular commercial ...
2
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2answers
296 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 ...
3
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1answer
65 views

Puzzler: help understanding these amazing Curiosity eclipse GIFs

Starting from Curiosity Observes Sunset Eclipse: Sol 2358 I found three images in the sequence PIA23133, PIA23134, and PIA23135 which I thought would mean (but don't know for sure) that they are ...
10
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2answers
936 views

How could an induced magnetosphere be created at Mars for terraforming?

In the long run Mars needs a magnetic field to keep a thick atmosphere and for radiation shielding, if humanity were to terraform it. Starting a dynamo in Mars' core seems forever impossible, but a ...
12
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2answers
3k views

Can a rocket refuel on Mars from water?

Can a rocket run only on hydrogen and oxygen? Could a rocket, rover, and electrolysis machine be sent to either of Mars' poles to excavate ice to make hydrogen and oxygen to refuel an unmanned rocket? ...
5
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0answers
64 views

Would a terraformed Martian athmosphere even persist? [duplicate]

So I saw a question here mentioning that omnipresent idea of terraforming mars by somehow giving it more atmosphere (here it was melting/evaporating the polar ice caps). My problem with that is: ...
8
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2answers
1k views

Can a machine process and run on $CO_2$ and $H_2O$ for an $O_2$ by product?

On Mars studies have shown that carbon dioxide solidifies to dry ice at the poles. During the winter months can electrolysis be applied to collected and then contained liquid $CO_2$ to replenish ...
3
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2answers
244 views

Could a fat rocket be used on Mars?

Since Mars' atmosphere is around 2% the density of Earth's then could a much wider rocket achieve orbit? Could the rocket be in the shape of a capsule or an optimal shape for reentry on Earth?
2
votes
1answer
124 views

Do Mars rovers have irises? How do they safely look at the Sun?

This excellent answer by @MarkAdler to the question Opportunity's last tau was 10.8; what does that mean and how is tau defined and measured? explains that Curiosity uses its PanCam to image the Sun's ...
2
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1answer
148 views

How would this two-stage Mars Ascent Vehicle work? Where do you sit?

This curious answer shows an image of a liquid-fueled Mars Ascent Vehicle with a sign in front that only says Two Stage Mars Ascent Vehicle Question: Is there some NASA program associated with it ...
2
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1answer
48 views

Is there mineral nitrogen on Martian surface? [closed]

I am aware of the atmospheric composition and pressure. I am looking for research papers which state the mineral content of Martian soil.
51
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2answers
19k views

Why are we trying to build a base on Mars before the Moon?

My question is very close to the question answered in the link below and is raised by the answers that question received: Is a Moon-base inherently more dangerous than a Space Station? Why are we ...
2
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1answer
163 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 ...
2
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2answers
197 views

Maximum height for a Mars Balloon?

The altitude record for an unmanned balloon is 53.0 kilometers. wikipedia If we use this Earth based record for an estimate of the maximum possible height of a balloon started from Mars surface, ...
0
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1answer
78 views

What types of engines are able to go from Earth orbit to Martian orbit? [closed]

What engine is the most efficient in fuel and/or time to go from Earth orbit to Mars orbit and back again that are not capable of launching from the ground?
1
vote
1answer
306 views

Is a ballistic blimp entry possible on this way?

Could the entry of Mars with balloons work by inflating to equalize with the atmospheric air pressure, while establishing buoyancy before meeting the ground? Would a balloon pop if dropped from space?...
8
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1answer
193 views

Fastest orbit transfer constrained by maximum g-force magnitude

Let's consider an imaginary constant 1g rocket from Earth to Mars. What is the fastest possible trajectory? Intuitively it seems that the fastest travel time is achieved with the "radial" trajectory (...
3
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1answer
84 views

Would high altitude native populations make better astronauts for a Mars mission?

High altitude populations in Tibet, the Andes, and Ethiopia have genetic adaptations that allow them to better handle low oxygen levels. They are also used to colder and drier climates. And lastly ...
0
votes
1answer
115 views

Fuel vs food on the trip to Mars?

How much food for each person is need and fuel per various engine to go to Mars on the current 9-month trip there then 3 months on Mars and the 9 months back? Can time be saved on the trip to and from ...
8
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2answers
1k views

Could aluminum undergo a thermite reaction with Martian dust?

From what I understand, Martian dust is primarily composed of iron oxide, which is one ingredient for a thermite reaction. If heated to the proper temperature, would aluminum (possibly powdered) react ...
4
votes
1answer
122 views

What type of software is used to make radiation shielding simulations for use in Space or Mars?

Hopefully this is relevant to the board and doesn't get deleted. Quick background: In Thailand. Grad student, mechanical engineering, with very limited knowledge regarding nuclear or space radiations. ...
2
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3answers
158 views

Instead of approaching Mars from behind can we approach Mars from the front of its orbital path? [closed]

Nine months is what google maps said to get to Mars. I would like to know if fuel was no expense how long could we get to Mars other than the method below? Is the 9 months and the method just what our ...
19
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4answers
1k views

What payload was expected for the 2018 Mars Dragon flight (“Red Dragon”)

SpaceX has long been planning to use Dragon capsules to carry objects anywhere in the Solar System. They have officially announced a 2018 launch to Mars. Specifically, the launch window is April-May ...
4
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2answers
179 views

If we can reduce travel time to Mars below the Hohmann standard, would we still use the same launch window?

If we can reduce the travel time to Mars below the Hohmann transfer orbit's typical 258 days, would we still use the usual Hohmann launch window or delay launch accordingly? For example, if we ...
5
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2answers
178 views

How does InSight measure wind speed?

According to this answer the weather at the InSight lander 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 what ...
5
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2answers
1k views

Could a cubesat propel itself to Mars?

I wrote the answer below to the question Could a cubesat be propelled to the moon? before realizing that it said Moon and I'd written it for Mars, so I've cloned that question and moved the answer ...
7
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4answers
2k views

Can we use a rail gun on the moon to launch stuff directly to mars?

Quite a bit has been written about railguns launching stuff to the earth. But has any work been done on using the moon as a pit stop between the earth and mars.
5
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1answer
997 views

Why is Beresheet doing a only a one-way trip?

Why is the SpaceIL Lunar Lander doing a one-way trip? Is that a common project to do nowadays, to send landers to Mars and the Moon without returning them?
1
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0answers
115 views

Speed needed for the ship to escape Mars, on The Martian movie

Based on the two speeds and altitudes that are presented in the movie: "The Martian" which are respectively 741 m / s and 1350m, 850 m / s and 1843 m I would like to prove with calculations whether or ...
13
votes
1answer
406 views

How did NASA's Deep Space Network encode and broadcast music to Opportunity?

@Ingolifs's answer to the question What was the last message to Opportunity today (13 Feb '19)? quotes ArsTechnica's Opportunity did not answer NASA’s final call, and it’s now lost to us: Late ...
2
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1answer
370 views

Martian Carbon Dioxide Turbine Oxygen Generator

How much solid Carbon Dioxide can be collected in a container with the top of the container level with the ground during a Martian Winter? Side Question: What do you call a generator that runs on the ...
19
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1answer
2k views

Brushing clean a Mars lander's solar panels

A comment by SF. regarding the InSight Mars lander caught my attention: I really, really wonder why they didn't just include a small compartment with a duster brush grippable by the robotic arm. ...
4
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2answers
2k views

Dimensions of the Curiosity Rover?

Does anyone know where I can find more detailed dimensions of the Mars Curiosity rover? For example, what are various dimensions of the boogie rocker system? Or the dimensions of the main body ...
2
votes
0answers
107 views

3D Puzzler; why are InSight's two RISE horns pointed slightly south of east, and north of west?

@karthikeyan's excellent answer links to The Rotation and Interior Structure Experiment on the InSight Mission to Mars (Folkner, W.M., Dehant, V., Le Maistre, S. et al. Space Sci Rev (2018) 214: 100. ...
5
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1answer
178 views

Could Mars ocean still be there?

So it’s pretty much agreed that Mars was once a wet planet, and most of the water was lost to space. However, I am unable to see why that is necessarily the case primarily for the same reason that ...
6
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1answer
134 views

Have the rovers on Mars encountered anything unrecognizable to geologists?

We have quite a few rovers trundling around Mars. Just from reading the popular news, I get the impression that everything encountered so far (minerals, rocks, strata, formations, structures, etc.) ...
1
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1answer
32 views

What is VBB recentering (InSight lander's Very Broad Band seismic pendulums)?

From the Planetary Society Blogpost InSight Update, sols 25-42: Seismometer sensors working! Tricky setup and cable management on Mars This is an animated GIF: It's fairly subtle, you may not notice ...
8
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5answers
2k views

Could an Apollo mission be possible if Moon would be Earth like?

I suspect that actual technology results in the apparently paradoxical situation that is easier to visit the moon rather than a comfortable planet able to sustain life. I am obviously supposing the ...
6
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3answers
485 views

Why would Mars' sky appear blue at dawn and dusk, but red during the middle of the day (reverse of Earth)?

After reading the really interesting question and discussion Terrestrial Exoplanet Skies – I've Built a Visual Sky Chart. Is it Accurate? I was reminded that in this video at ...
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2answers
172 views

Do current plans for people going to Mars by SpaceX depend only on consumables loaded from Earth?

Do current plans for people going to Mars by SpaceX depend only on consumables loaded from Earth or do they also include obtaining some materials from Mars fairly soon after arrival? Does the plan ...