Questions tagged [mars]

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

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6
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1answer
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Would 2 areostationary satellites around Mars, over opposite longitudes, allow constant communication with rovers?

I've heard that rovers on the surface of Mars can only communicate with and send data to orbiters for only 8 minutes at a time. Wouldn't two areostationary_orbit satellites orbiting opposite to each ...
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Can it be estimated when a first settlement near the equator would become more economical than one at the midlatitudes of Mars?

Choosing the right place on Mars for a settlement would be of course an important decision because once it's there it would take much time and money to move on to another, better location. Because the ...
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Is there possible engine damage without launch platform on Mars return flight?

When a Starship has landed on Mars, there is not going to be any kind of prepared platform initially. (That may be a task for early crews to resolve). Is there the possibility that Starship, sitting ...
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When our Moon is hiding Mars, is it possible to create a radio communication between Earth and Mars?

According to this link Mars is hiding behind the Moon ... It’s a twice-a-year occultation; like the eclipse When such situations happen, can we communicate with the Mars rovers, and in the future - ...
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Use of VLF to create a Mars barrier

I just ran across some older articles in 2017 discussing how VLF radio waves created an artificial barrier to space weather. Basically how VLF improves Earth’s protection from solar radiation. This ...
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Why do we travel on an elliptical path towards Mars? [duplicate]

A typical rocket path to Mars is shown below: Why can’t we just cut diagonally through instead of travelling over a long elliptical path? Sort of like this:
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3answers
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Mars. Would it save time to launch from the ISS?

With the Space X success at re-using rockets, my thought is that the second stage could be refueled at the ISS. Similarly, fuel could be sent to orbit Mars. My thought is it would allow for greater ...
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What should be the shape of a rocket going to Mars, since Mars atmosphere is around 2 percent of that of Earth's?

What should be the design or shape of a rocket going to mars?
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1answer
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Are there enough people who have the resources to pay for a one way trip to Mars to start a colonization?

Are there evidence that shows there are enough people who have the resources to pay for a one way trip to Mars to start a colonization? If there are not, then any near future proejcts won't go further ...
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The Surface of Mars

There are surface features on Mars that we can observe with remote sensing data. There are many shorelines seen in a way. Despite its subtle atmosphere or storms, these surface features remain. How do ...
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Challenges and power required to make useable iron from iron oxide on the surface of Mars?

There is a very large amount of iron oxide on the surface of Mars within easy reach (once you are there of course). What would be the practical challenges to collecting this and turning it into usable ...
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Do we know the likely conditions on Mars when its orbital eccentricity was very low?

Mars's eccentricity changes dramatically from highly eccentric, like now, to nearly circular, eg 1.3 million years ago and 1 million years in the future. Mars is more within the Sun's habitable zone ...
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Lowest orbit of Mars orbiters?

There were a lot of orbiters sent to Mars already. From all the Mars orbiters which one had the lowest altitude?
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How big is Mars as seen from Phobos?

If I were standing on the surface of Phobos looking at Mars, how big would it appear in the sky? Would it be like one hand at arm's length? Or take up like a third of the sky?
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What is the lowest possible stable Mars orbit?

Due to atmospheric drag, the lowest altitude above the Earth at which an object in a circular orbit can complete at least one full revolution without propulsion is approximately 150 km (93 mi) while ...
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Geolocalizing photographs on astronomical bodies

In Are pictures taken from ISS geolocalized? I was considering photos taken on the Moon by astronauts. How can I determine a photographer's position and lens direction? And further, since there isn't ...
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What are ALL the characteristics for for human habitability of worlds?

We've got a good head start at our original table here, but is there anything else we need or have missed that impact on human habitability of worlds? It's helpful to compare and contrast places in ...
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How would you calculate the maximum bandwidth possible in space?

If you'd take Earth and Mars, and at both their closest and furthest position (ignore the Sun being nearly in-between for a moment), what would be the maximum amount of bandwidth possible between ...
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What's the current state of Mars orbital infrastructure?

As per this Wikipedia article Mars currently has 6 operational artificial satellites: 2001 Mars Odyssey Mars Express Mars Reconnaissance Orbiter Mars Orbiter Mission Mars Atmosphere and Volatile ...
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Terraforming Mars using a combination of aerogel and GM microbes?

Silica aerogel is a technology that's been proposed for colonisation of Mars. Basically, it's a very good insulator that's also transparent to visible light, and could be used to warm up parts of Mars ...
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1answer
181 views

A retracted paper about Chlorophyll on Mars?

Recently, Gilbert Levin, one of the experimenters behind the Viking labeled release experiment, wrote this letter to the editors of Science. He makes this claim of particular interest Chlorophyll was ...
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What is the baseline for carbon isotope ratios?

In the Martian atmosphere, the ratio between concentrations of carbon-13 to carbon-12 has been measured, for example reported in Mahaffy, Paul R., et al. "Abundance and isotopic composition of ...
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Would Earth fireworks work on the Moon or on Mars?

Fireworks have had a very long history and have evolved into highly engineered devices with simultaneously excellent performance and reliability. Even small tweaks require research, testing, and are ...
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How to determine the distance between Olympus Mons and Valles Marineris?

How can I determine the distance between Olympus Mons and the closest point of Valles Marineris? What tools are available to the general public for these kinds of queries?
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What is the correct rough estimation for the payload to kick-off a sustainable Mars colony?

In this talk, Elon Musk explains our current global capacity required to kick-off a sustainable Mars colony, should be about 1 000 000 tons (including humans). While this is for sure just some rough ...
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How often have dust devils saved a Martian lander or rover?

This answer to How are the Mars Rovers maintained? reminds us that ...much to the surprise of the early Mars scientists and rover teams, Mars takes care of the dust problem for us! Mars' typical ...
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Life on Mars: How do we know it is not from Earth?

Firstly I would like to start the question with the knowledge that we have, that the most basic form of life we want and expect to find in our Solar System is the primitive kind, such as viruses or ...
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How are the Mars Rovers maintained?

I am really curious in finding out how the Mars Rovers are maintained. The communications with the software could be done as long as there are no connection malfunctions, and I suppose they have a ...
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What is the closest distance a human being has come to Mars ever since the beginning of the space age?

Ever since we started space exploration, what is the closest a living human being has come to Mars?
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Is the Low-Density Supersonic Decelerator scheduled for any upcoming Mars mission? Is the program still active?

Back in 2014 and 2015, some tests of the Low-Density Supersonic Decelerator were performed. The LDSD is intended to land heavier payloads on Mars than is currently possible. Mark Adler (the project ...
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Trying to understand if or how operating a rover on Mars from Earth could work

If you used something like google maps to create a 360° Topographical map of an area on Mars could you use it to create a virtual simulated reality similarly to how you would manipulate google maps ...
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What would be the challenges for a settlement immersed in liquid fluorocarbon on Mars?

Perfluorononane is a fluorocarbon with a density of 1.8 g/mL and a melting point of -16⁰ C. According to this paper it has a vapor pressure of about 0.7 kPa at 15⁰ C, so in regions with low altitude ...
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Why were only three known-negative soil samples used to determine the Viking labeled release experiments' false positive rate?

According to Levin, Gilbert V., and Patricia Ann Straat. "The case for extant life on Mars and its possible detection by the Viking labeled release experiment." Astrobiology 16.10 (2016): ...
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Is the 1970's Viking Orbiter due to contaminate Mars?

From Wiki: The Viking program ended on May 21, 1983. To prevent an imminent impact with Mars the orbit of Viking 1 orbiter was raised on August 7, 1980 before it was shut down 10 days later. Impact ...
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Is there any live classes for learning about Mars and Universe by professionals?

I have 10 year old son and he is crazy about Mars, Space, Blackholes, Universe , Rockets, and Satellites. Right now he goes to youtube and tries to learn. But we don't know which video is good and ...
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Is there any footage from Mars where you can see Deimos or Phobos getting bigger and smaller as it goes through the sky?

This answer mentions that on Mars, you can see its satellite get bigger and smaller as it rises and sets, because the satellite orbits much closer than our own Moon does from Earth. I'm pretty sure ...
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ROV-E compact configuration

Assuming that ROV-E could be employed in a real space mission, which would be the best configuration to store it in a larger spacecraft or linked to a larger spacecraft? Is it possible to modify the ...
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Has Same Beam Interference (SBI) been used or at least tested at Mars? Are there plans to use it in the next few years?

Section 5.4 of Descanso I, Radiometric Tracking Techniques for Deep-Space Navigation by Catherine L. Thornton and James S. Border titled Future directions in Radiometric Tracking; Same Beam ...
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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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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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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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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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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 ...
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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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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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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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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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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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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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