Questions tagged [mars]

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

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When is the next Transit of Venus from Mars?

When will the next transfer of Venus take place from the perspective of Mars? Will the next human to view one be a Martian?
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How could the landing date of Perseverance Rover be fixed irrespective of 26 days launch window?

I am very much aware of this question from 2018 by @uhoh - Why would InSight's arrival date at Mars be fixed, and independent of the launch date?. I was led here by a similar question which arose in ...
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For any Mars Station to work we need to build a dedicated 100% sustainable survival pod NOW! [closed]

We are creating a project in Antarctica to simulate life on Mars or the Moon. We are a global group of concerned citizens from all nations. I am new to this group so Im coming straight to the point. ...
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Why was there never a lander for the Martian north polar cap?

Since the Martian poles are water ice caps, belong to the most likely locations on Mars to host life, and the north pole being the most likely place for a crewed mission, it seems reasonable that one ...
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Kinematic and Dynamic viscosity on Mars

I've been looking at the Mars helicopter (Ingenuity) that will be onboard the Mars 2020 rover and I am having trouble figuring out how they determined the size of the rotor blades. Specifically, I'm ...
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What are the advantages of building a human colony on the Moon vs Mars?

The opposite question, What are the advantages of building a human colony on Mars vs the moon? was asked yesterday. I thought it made sense to ask this version as a corollary. As noted in the other ...
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What are the advantages of building a human colony on Mars vs the moon?

Why would humans try to establish a colony on Mars rather than on the moon? Seems to me that both bodies are similarly inhospitable, yet the moon is so much easier to reach (and we should be able to ...
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Sabatier reaction oxygen to methane ratio for Mars ascent propellant

The Sabatier reaction is as follows: $$\mathrm{CO_2 + 4\: H_2 \rightarrow CH_4 + 2\: H_2O}.$$ If water is electrolysed $$\mathrm{2\:H_2O \rightarrow 2\: H_2 + O_2}$$ the global reaction becomes $$...
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Where exactly are those eight steep slopes on Mars revealing structures of buried ice?

Credit:NASA/JPL-Caltech/UA/USGS The image above is from Phys.org's article Steep slopes on Mars reveal structure of buried ice that I came upon by the link in a comment from @Mark Adler after his ...
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How does time work on other planets?

I’m a game developer making a space-based game. I want to implement a system where the time is different depending on the planet. I think this would work like time zones, but to be honest, I’m not ...
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Starship fuel temperature at trajectory corrections on it´s way to Mars

There is no problem to use LOX and CH4 at ambient temperature at the many trajectory corrections on it´s way to Mars? I guess that they will not hold cryogenic temperatures so long. I know that the ...
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Parachute characteristics of the Viking mission

I'm looking for the characteristics (diameter, coefficient of drag, altitude and velocity of deployment) of the parachute used by the Viking descent module on Mars. I found in this document [1] that ...
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View the surface of Mars via Hubble

Has the surface of Mars been observed by the mirror of Hubble ? For example, it could be a good idea for humans to be able to see the lovely Curiosity Rover via Hubble from above.
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How do we know how to distribute food supplies to import to Mars between 1st and 2nd tour?

Coming from this question about Mars foundation cargo, how do we know which food to deliver with the first and with the second cargo? (2x2x100t in total) possibly the first tour could carry more ...
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At what altitude(s) were the Viking BLDT rockets fired?

I'm trying to understand the details of the 1972 Viking BLDT test missions (in earth's atmosphere). I found this diagram in a book and the general description that the (four) BLDT (balloon drop) tests ...
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What cargo is currently planned for SpaceX cargo missions to Mars to lay the groundwork for manned missions?

Answers to What are the most difficult challenges SpaceX will face getting astronauts to Mars by about 2025? talk about some initial cargo mission to Mars, as does SpaceX: Here’s the Timeline ...
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Balancing Perseverance Mars Rover; couldn't they just “move stuff around a little” rather than add 6+ kg of dead weight?

The NASA News item NASA's Perseverance Mars Rover Gets Balanced says: Just as an auto mechanic places small weights on a car tire's rim to bring it into balance, the Perseverance team analyzed the ...
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How to find the moment of inertia of the Viking capsule?

I have an assignment where I have to simulate a Mars re-entry using the Viking capsule. I have finished it but now I want to go further and try to make my capsule glide. For this I need to enslave the ...
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Proposals being considered for dealing with deceased future colonists on Mars or Elsewhere in the Cosmos

This question assumes that in the future a sizeable colony of humans might be established on Mars, or elsewhere. On Earth, one common way to deal with the dead is burial. This system relies on ...
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Are there any studies or technology envisioned for Mars entry and landing without a parachute?

Are any space agencies examining the possibility of a Mars landing without a parachute? It wasn't clear to me if the use of the HIAD (Hypersonic Inflatable Aerodynamic Decelerator) would eliminate ...
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Mars Crewed Missions: Use of In-Situ Resource Utilisation (ISRU) for the Return Trip Propellant

From what I've read from NASA's Mars Design Reference Architecture (DRA) 5.0 and other articles, the use of ISRU for the ascent vehicle propellant is usually considered (be it atmospheric based, ...
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When things land on Mars what fraction of their velocity do they remove propulsively?

Some recent comments have got me wondering about this What is the distance between one of the mars's satellite revolving near the highest volcano olympus mons and the volcano olympus mons? comments ...
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What is the distance between one of the mars's satellite revolving near the highest volcano olympus mons and the volcano olympus mons? [closed]

Olympus mons is 27km high-more than three times the height of Mount Everest. Mars needs human landing so would we get a benefit if we landed on olympus mons as our first landing? Would the height be ...
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Will transit time render Mars disease free?

It's going to take us a few months to travel to mars in our spaceships. Will the relatively small size of the ship combined with a few months of "isolation" result in Mars being disease free until ...
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How does a space vehicle which carries Curiosity or Spirit rover reach a planet? [closed]

I don't know much science but was curious about it. So, what I've seen in movies is that there are lot of objects in the space and many other space items (made of rocks, moving stars etc.). So when ...
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Are there still more images of caves on the surface of Mars that could be easily made accessible for humans?

Image captured by Curiosity on sol 1087 This is the first cave on Mars I've seen so far that could be (made) accessible for humans. Are there still more images of caves on Mars captured by one of ...
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What “flickering goggles” do JPL scientists rely on to explore the Martian surface in “genuine 3D”?

Gizmodo's NASA Is Using Red and Blue 3D Glasses to Safely Drive the Mars Rover While Working From Home says: To safely navigate the Curiosity rover across the surface of Mars, over 120 million ...
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On what kind of martian soil or rock will the Perseverance rover drop its helicopter?

The image below is cropped from the high resolution version of NASA's Mars Helicopter and Perseverance Rover PIA23824 and shows the helicopter in it's stowed position on the underside of the rover ...
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Perseverance Rover to drive carefully for months while helicopter hangs from underside?

The image below is cropped from the high resolution version of NASA's Mars Helicopter and Perseverance Rover PIA23824 and shows the helicopter in it's stowed position on the underside of the rover ...
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Are there any at least somewhat authoritative estimates of how long it will be before people will land on Mars and setting up camp?

While the naive but perfectly valid question Are they building on mars or do they have a camp there? was closed and overly downvoted, I think my answer there was reasonable; the perception by the lay ...
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Why does the Perseverance rover have such complicated shaped spokes in its wheels?

Phys.org's NASA's Perseverance Mars rover gets its wheels and air brakes has some interesting photos includes some nice photos and below I've included a cropped section of a photo of one of ...
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Are they building on mars or do they have a camp there? [closed]

They are making vehicles to go to mars with and they haven't gone yet. And it is said that they want to camp there and bring people and even have a space camp.
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What effects would the longer days on Mars have on humans?

Afaik, humans never tried to live according to shorter or longer days so the Martian astronauts might be the first humans from Earth that have to follow a different cycle. The Martian day (Sol) is ...
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Can any aspect of the brightness of Martian twilight be determined by Curiosity's photo of Earth?

Curiosity took this image of Earth on Jan. 31, 2014, 80 minutes after sunset. Stellarium has the Earth >15° above the horizon 80 minutes after sunset on that day. With Stellarium indicating the ...
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Are there any preliminary results from Mars lander InSight's RISE antennas?

@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. ...
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What schedule do Curiosity operators follow so Mars Time does not negatively impact their performance and health?

In the Choosing Mars-Time: Analysis of the Mars Exploration Rover Experience paper (2004), the NASA Ames Human Factors group recommends that those working on the Mars Exploration Rover mission should ...
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Aldrin cycler mission to Mars in MATLAB [closed]

I am planning to do a mission project on Aldrin Cycler (Earth to Mars) in MATLAB. Can you please suggest me where to start. I tried reading few research paper related to this topic, any other advice?
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Locations of the terminator on Mars' surface on 1976-07-24T10:35:26Z?

How can I find points of latitude and longitude on Mars that fall on the terminator (day/night line) on a specific date, for example 1976-07-24T10:35:26Z as ...
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Which Viking-1 orbiter photo is this? When was it taken and what part of Mars is shown?

This answer to Are there any photos of the Martian terminator from low Mars orbit? includes (without credit) what looks like an oft-repeated photo of Mars. A comment written from reverse image ...
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Does lower gravity on Mars make it unsafe and unhealthy for humans?

I've been thinking about proposals to live on Mars. One idea is to create an artificial magnetic field to protect from solar radiation. Another idea is to warm the planet using solar mirrors. In the ...
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Are there any photos of the Martian terminator from low Mars orbit?

This photo of Earth was taken from the ISS, an altitude of 211 nautical miles. This photo of Mars was taken 71,000 kilometers above Mars (about 10 Mars diameters away). Are there any images of the ...
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What is the force of asteroids that hit Mars?

Below is a link to an article I was reading (Keeping in mind it was difficult for me to find any other articles of the kind) that talks about how often asteroids hit Mars. Unfortunately, it is very ...
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How bright is twilight on Mars compared to Earth?

The surprising answer to How much more quickly does night come on Mars compared to Earth? Will it be easier to see Mercury there? is "up to two hours(!)" "...indicating that Martian dust extends very ...
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How bright is the Martian landscape during the long (up to two hour) twilight?

The answer to the question "How much more quickly does night come on Mars compared to Earth? Will it be easier to see Mercury there?" says Martian twilight can last up to two hours. Has any lander ...
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What was the effective magnification of the Mars Reconnaissance Orbiter's HiRISE camera to acquire the detailed image of Earth?

On October 3, 2007 NASA's Mars Reconnaissance Orbiter HiRISE camera acquired this image of the earth and the moon from Mars The oceans and clouds can be easily distinguished and "the west coast ...
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What is the day/night cycle at the north pole of Mars?

Here on Earth, we have polar nights and midnight suns at our planet's poles. In terms of Sols, what would the day/night cycle on Mars be for a colony situated at the north pole?
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What is the acceleration necessary for a Brachistochrone transfer from Earth to Mars?

With these orbital configurations, source-Bing leaving Earth on Aug 16, 2106 and arriving on Mars October 10,2106, what is the lowest continuously-applied acceleration that can make what is ...
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Could the Electron launch a cubesat to Mars

Could the Electron in combination with it's kickstage deliver any meaningful mass to Mars, ie; a 2kg cubesat or is it unable to reach the required velocities even with no payload. Rocketlab are ...
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What was the radius of Insight's disruption of Martian regolith?

A NASA animation depicts the Martian regolith being disturbed by the retrorockets of the Insight spacecraft while landing. Did NASA estimate the radius of the disruption, or was there any indication ...
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Would a manned spacecraft on a Mars mission need large windows?

I'm thinking of scenes like this from the film The Martian, where we see large picture windows in one of the modules in the Ares III. Wouldn't the windows look out onto either black space or the Sun ...

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