Questions tagged [mars]

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

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Query on artifical gravity via symmetrical tethered rotation

Has there been any consideration to the use of a tether between to identical space vehicles (e.g. two SpaceX Starships) to induce artifical gravity? I think you would need a diameter that could only ...
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Did Mars Express get hit by a “Meteor hurricane”? (2014 October 19, comet C/2013 A1) Was it observed at all?

The abstract of the open access 2014 paper Meteor hurricane at Mars on 2014 October 19 from comet C/2013 A1 says: omet C/2013 A1 will make a very close approach with the planet Mars on 2014 October ...
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Challenges to mapping the surface of mars with helicopters? Would it be better than satellite images?

Presuming that we could build on what we learned from Ingenuity, and we built, launched, and landed a copter platform that was designed to autonomously map the surface of Mars, what challenges would ...
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How do we know what the atmospheric pressure on Mars is?

The martian atmosphere is 6 mbar. How do we know this? Which probe(s) had a barometer on board to measure this?
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Is CO + O ==> CO2 a possibility for propelling rockets off Mars? [duplicate]

Perseverance, the Mars rover, includes an experiment called MOXIE. This is a technology demonstration to show that Mars' atmospheric carbon dioxide can be broken into carbon monoxide and oxygen. ...
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Up to what mach/reynolds numbers will Ingenuity be tested?

From an aerodynamics perspective, velocity alone is insufficient to describe the flow regime experienced during flight. For the Ingenuity helicopter, what specific mach numbers and reynolds numbers ...
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Who said, “Take that, Jezero!” during the Perseverance landing?

During the Perseverance landing broadcast, many of us heard a voice call out, "Take that, Jezero!" Every article I can find simply identifies the speaker as "a controller" (or just ...
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Is it 100x more work to fly on Mars?

After watching the first flight of a rotor-powered craft on Mars, I wonder how similar flying on mars is to earth. I read: Mars has a much thinner atmospheric volume compared to Earth. Earth’s ...
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Local atmospheric pressure and local surface gravity in Jezero crater?

Did Perseverance and/or Ingenuity measure the local atmospheric pressure and local gravity where they are? Ingenuity had been tested in a 0.006 atm chamber on Earth, therefore I guess the local ...
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1answer
115 views

Is radiation on Mars line-of-sight? [duplicate]

Roughly a year ago, there was a TV show about colonizing Mars; National Geographic channel I think. The habitats were underground to avoid the Sun's radiation. So I'm wondering: does the radiation ...
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What would happen to an astronaut on the surface of Mars if a Carrington-event-like superflare hit the red planet?

If a coronal mass ejection with the intensity of the Carrington event1 or more hit Mars, what would happen to an astronaut on its surface who is too far from their base to return to in time? Assuming ...
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How often does Mars appear at the horizon in our sky? [closed]

How frequently does Mars appear at the horizon in a year(It need not be visible. It just need to be at the horizon)? How long does it take from one of these events to the next one? How long does Mars ...
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What would be the most appropriate shape for a satellite going to mars?

What kind of shape would be best for a satellite studying mars?
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Has any rover dragged a magnet across martian soil to see what gets picked up? Any magnetic measurements of specific rocks or particles of any kind?

On Earth, amateur and sometimes professional scientists collect dust from the tops of buildings or mountians (see also) and separate it with a magnet to obtain meteoric material. Not all meteoric ...
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(Why) aren't there mission updates for Perseverance like there are for Curiosity?

Mission updates for the Mars Curiosity rover in the first months of the mission starting in August 2012 happened almost every day with detailed information about drive planning, the use of the ...
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Are the Perseverance rover's “drivers” working on Martian sols or Earth days right now?

Business Insider's What is it like to drive the Perseverance rover remotely? A NASA engineer explains the challenges of piloting the vehicle's journey across Mars. includes the following discussion of ...
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Identify this Mars helicopter prototype and when and where it was built and tested?

The new NASA video Things are really looking up (on Mars) is a short set of vignettes in anticipation of the Ingenuity helicopter's first tests on Mars. Below is a screenshot of a historical file ...
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What is inside Perseverance? Is the only scientific payload the bunch of instruments hanging from the arm?

Perseverance weighs about one ton, it is as big as a car. But what is inside the vehicle that weighs so much? Is the payload only the instruments hanging from the arm? Is all the remaining hardware (...
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How to calculate the solar irradiance (flux) on Mars. But,measurments are made at Earth orbit or at 1 AU

There are many satellites measuring the solar flux in EUV and X-ray at 1 AU (Ex: SDO, SOHO, etc). In the case of Mars: MAVEN looking sun in a small band of EUV and X-ray at Mars. Is there any approach,...
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Could a Mars rover reliably navigate using the local magnetic fields?

Mars does not have a global magnetic field which guides charged particles entering the atmosphere. Mars has multiple umbrella-shaped magnetic fields mainly in the Southern Hemisphere, which are ...
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What instruments and techniques measured Mars' atmospheric D/H ratio which suggests (all of) it's water didn't evaporate after all?

The Time article Mars Has Much More Water Than Previously Known—But There's a Catch says: The greater weight of deuterium causes it to behave differently in the Martian atmosphere. While free ...
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How to filter NASA MARS2020/Perseverance raw images by altitude and azimuth of mastcam?

This URL allows querying NASA RSS API for Perseverance raw images: https://mars.nasa.gov/rss/api/?feed=raw_images&category=mars2020&feedtype=json&page=0&num=50&order=sol+asc&...
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Why (the heck) did Tianwan-1 insert into a low inclination orbit then execute a plane change from 11.8 to 86.9 degrees?

eoPortal's Tianwen-1 (China's first Mars Exploration Mission) shows the following graphic, caption and link. It's often discussed that orbital plane changes are like certain table wines in that they ...
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In which Mars orbit, Mars Orbiters are rotating around Mars

Like Earthbound satellites are stationed in the polar orbit or Geosynchronous orbit. In which orbit related to Mars the Marsbound orbiters are stations?
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What is the origin of dark streaks on the surface of Mars in Tithonia Catena?

Several dark streaks originating (or ending) from dark spots on the surface of Mars can be seen in this picture. They are no longer than 200 meters, aligned longitudinally, and some of them seem ...
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154 views

Would Ingenuity's cameras be capable to spot and/or make close-ups of possible biosignatures?

Mars Helicopter Technology Demonstrator mentions on page 13/14 the sensors that Ingenuity carries, among them two cameras: Navigation (NAV) Camera. This is a global-shutter, nadir pointed grayscale ...
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How do the small radio receivers on space probes catch enough of a signal to communicate with us?

From Scientific American, March 2021: Optics. Traveling Photons. Joanna Thompson. Much of today's space communication relies on radio signals. But these diffract and broaden as they travel, as ...
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How will the future Mars Space Suit Helmet design protect Astronauts from Martian Radiation?

Mars Space Suit Helmet Visor's were mostly made up of polycarbonate [1], the same material used for EMU's visor for performing EVA in earth orbit. Meanwhile, Mars' radiation is 2.5x higher. How are we ...
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634 views

Sending Mars rover to the Moon

What would happen if a Mars rover (let it be Sojourner, Spirit, Opportunity, Curiosity or Perseverance) would be sent to the Moon instead of the Mars? Let's not deal with the landing and let's ...
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What are those plastic hoses on Perseverance used for?

I've been trying to find out what this plastic tube is for that got cut during descent. It's a single tube so as far as l can tell not a loop. It ends in the lower right corner of the body (in the ...
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How could we grow plants on mars? [duplicate]

I was wondering there are ways to grow plants on the planet Mars and what would be needed to help them grow etc. I know some key factors would be full spectrum bulbs and violet blue lights but there ...
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Difference between “mafic floor” and “olivine-bearing floor” in Jezero crater? (Perseverance landing site)

Figure 3: Main geologic units within Jezero crater shown on a basemap constructed from images from the High Resolution Imaging Science Experiment (HiRISE) camera onboard the Mars Reconnaissance ...
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Why Perseverance's landing ellipse straddled the cliffs in the river delta; why so ambivalent about the two different geologies?

The Perseverance landing site has now been named for Octavia E. Butler and from here there will be a meandering climb to get up on top of the "cliffs" that are in the delta. I think that ...
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Heating Perseverance components prior to deployment

How is the heat generated by the MMRTG distributed to the operational parts of Perseverance prior to deployment?
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394 views

Can you estimate the diameter of the marked small craters of Mars in the firsts HiRes pictures released by China?

I would like to know the diameters of the smallest craters that can be clearly distinguished inside the black circle (see the quite large size image below). Black-and-white picture of Mars taken by ...
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Wondering about materials [closed]

I am currently designing a Revit project on the planet Mars I was wondering what a wall on a base like structure need to consist of to protect its from the planet atmosphere. any thoughts ? regards, ...
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What does it take to upgrade a radio antenna to receive from the surface of Mars?

All the discussion about receiving transmissions from Mars rovers got me thinking, what determines the capability of a radio antenna, and what goes into adding the capability of listening to a Mars ...
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196 views

Feasibility of Liquid Water at Bottom of Valles Marieneris

Last night I was looking at NASA's equations for pressure and temperature of the atmosphere of Mars. P (in kiloPascals) = $0.699 \exp^{-0.00009 h}$ The Valles Marineris is 11 kilometers deep at it's ...
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Even small countries have a few ~30 m diameter parabolic antennas but nobody reported signals coming from the landers on Mars. How is it possible? [duplicate]

The parabolic antennas with diameters of ~30 meters are all over the world. Even small countries have them. However, nobody, except DSN or other entities controlled by the US government, has ever ...
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Is Perseverance unable to move?

The wheels show no sign of use, there are no wheel tracks in any of the raw images, and the where-is-the-rover page shows no movement from Sol 0. Why not?
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162 views

How long will the “Send Your Name to Mars” chips aboard the Mars Landers and Rovers last?

I'm talking about the Chips NASA has placed on Curiosity, InSight and Perseverance: You could enter you name on https://mars.nasa.gov/participate/send-your-name/future and NASA etched your name on ...
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202 views

What could be strong arguments against Ingenuity following Perseverance at a safe distance when the flight test program has been a success?

This answer to the question "How long could the Mars helicopter Ingenuity keep up with the Perseverance rover if it wanted to?" reasons that indeed it could for years ! But according to the ...
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Would Mars become habitable to life if the sun starts to expand into a red giant? [closed]

If the sun expands then the distance between the sun and mars would become shorter. Thus more heat would reach Mars and perhaps the polar icecaps would melt. Could this lead to a thicker atmosphere ...
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81 views

Does Tianwen-1 have a near-repeat ground track orbit in order to scan the same general area on each of its low altitude passes?

Though it's not as easy1 to get details on Chinese missions in English, it seems that Tianwen-1 is in a 12,000 x 256 km highly eccentric orbit around Mars, with its hi res cameras able to resolve 0.5 ...
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Did the Perseverance sky crane kick up more dust than expected?

The video of the Perseverance landing showed the rover descending into a cloud of dust kicked up by the landing rockets. This is not surprising, but I always had the understanding that one of the ...
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172 views

Why does the Perseverance landing site have three close bright dots in a line, with a perpendicular dark streak?

The February 27 Astronomy Picture of the Day has a picture of the Perseverance landing region taken by the Mars Reconnaissance Orbiter. The landing site itself has a distinctive look: The left image ...
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94 views

Perseverance landing and the skycrane [duplicate]

I have a question about the skycrane which helped Perseverance NASA landing. In the image below, why there is not something like fire at the mentioned exhausts (I don't know whether exhaust word is ...
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1answer
249 views

Download all Perseverance Raw Images

I want to make an archive of all the Raw Images Percy will make during her mission. I would love to have separate folders for each Sol. The plan is to run a script which then grabs the images from the ...
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1answer
2k views

How hard is it to receive direct signals from vehicles on the surface of Mars, and has anyone other than the DSN done so?

Almost all communication from vehicles on the surface of Mars is relayed by spacecraft in orbit around Mars. However vehicles on the surface do communicate directly with Earth. This communication, ...
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1answer
357 views

Will the HiRes camera of the Chinese orbiter be capable of seeing the shadows of the landers and rovers on Mars?

The question is like this: The Chinese Mars Orbiter has a HiRes camera on board and I want to know if it is powerful enough to see at least the shadows of the landers and rovers now on Mars. The high ...

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