Questions tagged [mars]

Questions about the science or exploration of the planet Mars. See wiki for related tags.

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10
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1answer
672 views

Will InSight be able to pick up vibrations from the landing of Perseverance or Tianwen?

In roughly six months, two spacecrafts will be landing on Mars. Will the seismometers on InSight be able to detect vibrations from any of those landings?
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1answer
155 views

How to calculate the pressure at the floor of Ganges Cavus on Mars when it is filled to its edge with perfluorobutane?

Perfluorobutane is an inert, high-density colorless gas and has a high Global Warming Potential value of 4800. At about the same temperature of -1.7 ⁰C, it has a density of 11.2 kg/m3, opposed to 2 kg/...
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1answer
159 views

What if you tried to fly a kite on Mars?

I wonder what kite flying might be like on Mars, in one per cent the atmospheric pressure of Earth, about two per cent the Earth's atmospheric density and 38% the Earth's surface gravity. Are there ...
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2answers
222 views

Harvesting Venus atmosphere to Terraform Mars

Since Mars has such a thin atmosphere, to Terraform we would need massive amounts of Nitrogen. Would it make sense to import it from Venus? Also since venus's atmosphere is mostly co2, and we can make ...
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2answers
111 views

Will MOXIE get clogged or chemically degraded by martian dust?

MIXIE, the Mars Oxygen ISRU Experiment is an experiment on the Perseverance rover currently on its way to Mars, that will test solid oxide electrolysis as a way to extract oxygen from atmospheric ...
4
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1answer
228 views

Choosing a specific region to live on Mars, how important will the degree of dust there be, compared with the availability of water?

Credits: NASA/JPL-Caltech/ASU The map above shows underground water ice on Mars, it's from the article NASA's Treasure Map for Water Ice on Mars. The blue and purple represent water ice less than 30 ...
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6answers
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Would it be easier to put humans on Venus rather than Mars?

With all the speculation of manned missions to Mars, there is very little talk of a manned mission to Venus (whose orbit is closer to the orbit of Earth than mars is). That being said, would it be ...
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2answers
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Why use a Mars orbital Earth return vehicle for sample return?

NASA's plan is to use two separate missions to bring home the drill core samples that the Perseverance rover will take. The samples will in plan be picked up by a landed mission and launched to Mars ...
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2answers
168 views

How to calculate the local maximum solar radiation on Mars from day to day throughout a full martian year?

I would like to know where on Mars the least lowest daily temperatures depending on the time of year will be. At first glance one might think, as I did, that it has to be along its equator, but ...
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Could the SS520 be used to return a payload from Mars to Earth?

The Japanese SS520-5 nanosat launcher has a payload of 5kg or so to LEO on an all solid fuel rocket with a total mass of about 2.6 tons. To reach LEO its delta-V totalled over all three stages must be ...
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2answers
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Could one use an adjusted idealized greenhouse model to calculate the local average temperature on Mars?

The Idealized greenhouse model article on Wikipedia gives the following solution for finding the global surface temperature on an idealized planet with an atmosphere: $$T_s = \left[ \frac{S_0(1 - \...
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3answers
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Why exactly does Curiosity's RTG make more electricity on cold days?

There is a fascinating factoid in this answer to MMRTG- thermal and electrical output: The electric power of the thermocouples depends on cooling influenced by the environment. On a cold day on Mars ...
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2answers
154 views

Were there any experiments that produced rocket fuel grade methane on mars?

One of the main reasons that SpaceX's Starship engine raptor uses methane is because it can theoretically be produced there from atmospheric CO2 and subsurface H2O. Where there any experiments that ...
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2answers
66 views

Has ChemCam been used to characterize the martian atmosphere?

Laser-Induced Breakdown Spectroscopy (LIBS) can be used to measure the composition of a solid, a liquid or a gas. LIBS is the technology used in ChemCam of the Curiosity rover and in the SuperCam of ...
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How much pressure would the raptor engines experience when Starship does an atmosphere entry burn at Mars?

The Starship second stage has 3 sea level engines and 3 vacuum engines. When doing the atmosphere entry burn to mars, how many Bars will the raptor engines experience? I'm thinking that because of the ...
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2answers
100 views

What is the highest resolution camera on a Mars orbiter?

The GeoEye-1 satellite has the high resolution imaging system and is able to collect images with a ground resolution of 0.41 meters (16 inches) How about Mars then? From all the Mars orbiter's cameras,...
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24 views

magnitude of magnetic anomalies (Earth and Mars)

I've been looking for the magnitude of highest and lowest magnetic anomalies on Earth and Mars (mapped by spacecraft in low orbit), by searching online I couldn't really find a numerical value. From ...
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0answers
37 views

Is there any current imagery of Mars2020?

Are there any current photos or video from the Mars2020 spacecraft, or since the first burn? It would be cool to check on this daily/weekly.
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0answers
131 views

If Elon Musk wanted to bring back some Martian soil, would US permission be required?

A scenario occurred to me recently where the Chinese space program decided to go all-in on Mars sample return, and their schedule was such that it would happen before the NASA/ESA mission was ...
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1answer
161 views

How long could the Mars helicopter Ingenuity keep up with the Perseverance rover if it wanted to?

Wikipedia's Mars Helicopter Ingenuity says: It could potentially cover a distance of up to 300 metres (980 ft) per flight. Perseverance is somewhat similar to Curiosity which drove about 22970 ...
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2answers
172 views

Is Perseverance still in Safe Mode?

Messages in The Pod Bay and Space.com's NASA: Mars rover Perseverance in 'safe mode' after launch, but should recover both said that Perseverance was in "Safe Mode". Is it still?
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1answer
306 views

Why do Ingenuity's legs differ?

In the pictures below, I notice that not all of the legs of Ingenuity are the same (look at the end of them, directly touching the surface). It looks like a single one is different than the other 3. ...
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1answer
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How many Raptor engines will Starship use for TMI and Mars landing?

The Starship second stage has 3 sea level engines and 3 vacuum engines. I don't imagine that all 6 will be used for trans Mars injection, as it isn't very efficient. And for the Mars landing which ...
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0answers
80 views

Mars Sample Return Earth Return Orbiter — which propulsion system for what?

Many sources (eg this one) show the Mars Sample Return Earth Return Orbiter with both ion and chemical propulsion, and also state that it will be launched on an Ariane 6, but I can't find a clear ...
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1answer
131 views

What would be the most viable way to have constant communication with a Mars base?

I am currently working on a project involving designing a Mars base, and a major factor is establishing constant communication between Earth and the Mars ground base. I am thinking of utilizing laser ...
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1answer
100 views

Will surface samples from Mars orbit it in a spherical capsule until captured?

The abstract of the interesting 2001 NASA JPL paper Covering a Sphere with Retroreflectors says: Abstract- One of the future missions for Mars involves returning a soil sample from the Martian ...
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71 views

Is there a specific reason why NASA put MOXIE on a rover?

MOXIE or The Mars Oxygen In-Situ Resource Utilization Experiment is to be sent to Mars as a part of Perseverance's scientific payload. Sure the experiment is much needed and very anticipated, and ...
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What makes Earth-Mars transfers more non-Hohmann; inclination or eccentricity?

Answers to Why do many Mars missions launch now, if the Hohmann transfer orbit is the most propellant-saving one? and discussions below them made me wonder what makes Earth-Mars transfers more non-...
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Is ESA's ExoMars TGA getting old and unable to support Rosalind Franklin rover for the full potential duration of its missions and extensions?

Wikipedia's ExoMars explains that the Trace Gas Orbiter or TGO part of the mission was launched in 2016 and the rover was originally scheduled to launch in 2018. This launch was delayed until 2020 and ...
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2answers
536 views

Will Perseverance's landing be live streamed?

I know that the launch will be live streamed, but I am interested in the landing. Is there a plan to make it possible for the general public to get access to landing video as soon as mission control? ...
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2answers
219 views

Why do many Mars missions launch now, if the Hohmann transfer orbit is the most propellant-saving one?

The Hohmann transfer orbit is the most propellant-saving transfer orbit to Mars. When using this kind of transfer, the rover/rocket/etc. starts from Earth when Earth and Mars are in conjunction. But ...
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1answer
90 views

Would Earth without water look like Mars? [closed]

I was watching this slideshow of 4K images of the surface of Mars, and I noticed that the surface looked mostly smooth, with the most rugged features being crater impacts (sort of resembling an Earth ...
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0answers
120 views

Space Exploration and Religion [closed]

When various civilizations practice religion, its usually linked to some monuments or holy sites in Earth. As an example in Christianity, its Bethlehem, in Judaism, its Jerusalem, in Islam, its Mecca, ...
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How sharp are the bits of sand and rock on mars?

Lunar regolith is quite sharp, so abrasive it can cut kevlar. This is because there is no flowing water or substantial atmosphere to erode the material and smoothen it out, so meteorite impacts break ...
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1answer
81 views

Did the Mars Science Laboratory do any science that wasn't done by Curiosity proper?

This answer to What is the equivalent of Curiosity's “MSL” in the context of Perseverance? What's the official name of the mission? Are the distinctions similar? got me thinking that answers to Where ...
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10answers
8k views

Why Mars instead of a space station?

Elon Musk has made very clear that his goal is a colony on Mars. That doesn't seem ideal to me at all. Certainly some people will be happy to live on Mars for the rest of their lives, but they will ...
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0answers
54 views

Engine configuration for lander

Which is a more stable lander design: 1.Single central engine. 2.Multiple engines located near the corners Following is the design for Tianwen-1, the Chinese Mars lander: And following is the design ...
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1answer
93 views

Why aren't there HiRISE observation footprints near the Martian poles?

Browsing the HiRISE observations of Mars, I noticed that there aren't any observation footprints at a latitude lower than -65° or higher than 65°. Why is this? Is there something I am not seeing? Is ...
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2answers
2k views

Mars versus the poles of Mercury WRT colonization

From MESSENGER Finds New Evidence for Water Ice at Mercury's Poles : Credits: NASA/John Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/National Astronomy and ...
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1answer
82 views

How was Jezero crater selected?

Perseverance is going to land in Jezero crater. How was this landing site selected? I assume there were several landing sites that were considered, and different scientists wanted the rover to land in ...
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0answers
51 views

Is there direct evidence of flowing glaciers on Mars?

I know that analysis of Mars photographs has revealed what appear to be the kinds of surface ripples that occur due to glacial flow. For example, this photo, taken from here: The glaciers appear to ...
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0answers
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How much altitude will curiosity gain by its climb now from the clay-bearing unit to the sulfate-bearing unit?

According to Space.com's NASA's Curiosity rover starts Red Planet road trip up Martian mountain: Curiosity's last stop from 2019 to this year was the "clay-bearing unit", another ...
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5answers
5k views

Why do you need a heat shield on Mars entry if the atmosphere is so thin?

Mars' atmosphere is only .088 psi. Is that enough to cause heat at high altitude? Shouldn't you be able to fly close to the surface at orbital speeds like on the moon? How does a parachute work with ...
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4answers
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Do scientist who study martian geology typically use the term areology?

In the book Red Mars by Kim Stanley Robinson, I came across the word "areology". Is this word often used in scientific publications, or is it a term limited to the scope of science-fiction, ...
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0answers
45 views

What is the preferred orbital trajectory for a rover/lander to land on a body?

With the new perseverance rover about to launch to mars, I have a question about landers and rover orbital trajectories. Do the landers/rovers circularize their orbit before landing on the body or do ...
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1answer
62 views

Possible explanations to Mars' exceptionally strong magnetic anomalies

Some of the magnetic anomalies spotted in the southern hemisphere of Mars from orbit are exceptionally high in magnitude and they are an order of magnitude greater than what we would expect ...
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2answers
245 views

Delta-v penalty for stopping in a distant Earth orbit versus using atmospheric reentry for braking and returning to Earth from Mars?

Comments below this answer to What precautions are planned to prevent an accident or anomaly from releasing Martians into Earth's environment? say: Seems to me like a high earth orbit lab might be a ...
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1answer
134 views

Could artificial gravity on long space flights reduce deterioration of eyesight?

It has been found that micro-gravity adversely affects blood flow to the human eye. How will this problem be treated on flights to Mars, for instance? Rotating spacecraft, perhaps?
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1answer
94 views

Delta-v difference between Mars and Moon

Considering a simple Hohmann transfer, does it take less Delta-v and propellant to go to Mars than to the Moon
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1answer
374 views

What precautions are planned to prevent samples returned from Mars crashing and releasing organisms on Earth?

Bias disclaimer: I think that returning samples from Mars to Earth at a point in time where we also suspect there is a chance that there is microbial life on Mars is ill-advised and arrogant. We are ...

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