Questions tagged [mars]

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

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16
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3answers
5k 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 ...
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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
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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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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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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 ...
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5answers
699 views

Are there any plans to establish depots in space?

Fuel weight is a major limitation on the range of manned spacecraft. It might make sense to pre-position fuel tanks (establish depot/depots) in orbit with different planets and moons to serve as ...
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1answer
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What are the details of the SSTO Mars profile for the BFR?

In this link and on other occasions, SpaceX has indicated that the BFR would land on Mars, "top off the tanks" as the article says, and then launch back to Martian orbit. SSTO doesn't work on Earth ...
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3answers
687 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 ...
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1answer
394 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 ...
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Is it possible to deploy “geostationary” Mars orbiter?

Hypothetical question: Are we able launch an orbiter from Earth to Mars in a way that such orbiter ends on "geostationary" position, hovering always one specific place over Mars? My thought process ...
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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 ...
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1answer
478 views

Which computer monitors will work on Mars?

In The Martian by Andy Weir, the main character Mark Watney takes a laptop out of the habitation module to take notes. But when he comes out, he discovers that the LCD monitor is broken, because the ...
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1answer
858 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 ...
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3answers
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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 ...
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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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1answer
921 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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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? ... ...
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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 ...
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2answers
398 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
920 views

Why was MarCO-B CubeSats flying away after InSight landed?

Farewell to Mars November 26, 2018 MarCO-B, one of the experimental Mars Cube One (MarCO) CubeSats, took this image of Mars from about 4,700 miles (6,000 kilometers) away during its flyby of ...
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Delta-V to Low Mars Orbit

I'm making a Mars probe in Kerbal Space Program Real Solar System, and I have 13 km/s of Delta-V in the lifter itself. I have a cryogenic second stage with a KVD-1 engine, it has 7.36 km/s of Delta-V, ...
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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 ...
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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 ...
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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)?
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Can we detect the cell phone, satellite phone, or walkie talkie of someone walking on Mars from Earth?

We certainly cannot see a person walking on Mars from Earth. But what if the person is trying to use a cell phone, walkie talkie, or satellite phone? Although he won't have much luck using any of ...
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1answer
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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 ...
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Between a space elevator on Mars versus the Moon, which would have lower material strength requirement?

On one hand, the Moon has lower gravity, and the gravity from Earth also reduces the distance the it has to span. This is particularly true for EML-1, and a little less so for EML-2. I don't know if ...
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4answers
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What is the least energetic trajectory design to send uncrewed supplies to Mars?

Both Mars One and NASA have suggested sending uncrewed supply ships to Mars as part of a manned mission or colonization. These payloads can take all the time they like, not being constrained by human ...
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Differences in the design of a commercial Moon rover and a commercial Mars rover?

News in May, 2018: Spaceflight Now NASA cancels lunar rover, shifts focus to commercial moon landers Washington Post Stunning scientists, NASA’s only moon rover just got canceled Space.com NASA Kills ...
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1answer
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Designing a bicycle for Mars?

Assuming that Elon Musk's plan to send colonists to Mars is successful and I'm one of the chosen few, and assuming there's the mass budget for it, can I take my bicycle with me? What difficulties ...
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2answers
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How much elevation has Mars Curiosity climbed so far from the bottom of Gale crater?

Recently, I came across information that Curiosity is currently at -4220 m of altitude. I have three questions: Since there is no sea level on Mars, what is the level of reference for altitude ...
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Won't the heat sensor probe interfere with the seismometer?

I've read that the Mars InSight Seismometer will be deployed before the HP3 probe. Won't the digging interfere with the seismometer? Or the shock produced will be small enough to be dissipated by the ...
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What power source options provide reliable and sustainable power generation for a Martian Colony

In order to maintain a Colony on Mars, we will need to be able to provide consistent, safe, and sustainable power on the planet. The extremely cold temperature means that the need to maintain ...
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1answer
248 views

Would it be cheaper to go to Mars if the empty transit vehicle is slowly accelerated before the passengers board?

Would it reduce the cost/time to go to Mars with people if the transit vehicle was accelerated using less expensive means (i.e. ion engine and/or gravity assists), and the people got took a small ...
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350 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 ...
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How long would a Falcon Heavy last in orbit around Mars before degrading?

Elon Musk made another characteristic splash recently with his plan to launch a Falcon Heavy into orbit around Mars, with the bonus payload of his personal Tesla Roadster inside. Of course, it's an ...
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How is retropropulsion by the Falcon 9 first stage being used to design retropropulsion entry on Mars?

Much has been made of how the reentry burns of Falcon 9 first stages occur at an altitude where the atmosphere is similar in density to the atmosphere of Mars, and so they demonstrate that supersonic ...
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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 ...
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Low energy cements for Mars and Callisto. Waterless cement for the Moon. Any good candidates?

In the non-polar regions of the Moon and Mercury there is a shortage of volatiles, including hydrogen and nitrogen, so they might be regaded as too valuable to be "wasted" to prepare concrete. ...
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Is it possible for Curiosity to broadcast live HD television from Mars to Earth?

Current Mars rovers collect large amounts of data and image sequences on Mars and store them in memory, and usually they then transfer the data to a spacecraft in Mars orbit for rebroadcast to Earth ...
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1answer
468 views

Would a GPS type system on Mars really need a ground station?

This question and answer has got me thinking. Would one or more ground stations be necessary (or even just very beneficial) for a GPS-like system to operate around Mars? The atmospheric issues are ...
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Are there “rover-friendly region maps” for Mars?

Rover missions are hard - you need to put them down somewhere where they can safely drive around and measure (hopefully a variety of) interesting things. Future rovers may have legs as discussed in ...
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1answer
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How were Mars' zero elevation datum defined? What are their shapes?

Discussions on Boiling ponds and pools on Mars? led me to Wikipedia's Mars; Geography and naming of surface features which says: Because Mars has no oceans and hence no "sea level", a zero-...
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1answer
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Mars' atmosphere and the triple point of water

As I understand it, the average atmospheric pressure at the surface of Mars is close to the triple point of water. Is this a coincidence or does water have some sort of controlling effect on Mars' ...
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1answer
123 views

What are the technologies that can identify, validate, and quantify water-rich locations on Mars?

As the discussion progresses from the likelihood that there is water on Mars through yes, near the poles, now to to Is there really a frozen lake near the equator on Mars? and There's a lot of ...
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1answer
426 views

Sunroofs on Mars - durable transparent structural plastics lighter than glass to ship from Earth?

Comments below this answer to the question Which is easier to build on mars per square kilometer; greenhouse windows or photovoltaics/LEDs? discuss the possibility of using plastic instead of glass ...
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1answer
284 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. ...
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327 views

Which is easier to build on mars per square kilometer; greenhouse windows or photovoltaics/LEDs?

If someone wanted to grow large quantities of food on Mars and they wanted to specify sunlight rather than nuclear or other sources, the two options I can think of are greenhouses and photovoltaic/...
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Brachistochrone variation for Earth-to-Mars Orbit

Wouldn't a Brachistochrone curve to Mars orbit be a much faster and more efficient way to send personnel and equipment to mars as compared to the Hohmann transfer if we used an Ion engine? The below ...
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Why does the word “Mars” shows up in google maps when viewing the Goldstone DSN complex?

In the Wikipedia page for the Goldstone DSN complex there are coordinates. If you click them it takes you to GeoHack. I copies the decimal coordinates there ...

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